GarminIndex S2 Smart Scale, measure weight & body composition, BMI, weight trend, body fat percentage, muscle & bone mass, built in wifi, pair with Garmin Connect, up to 16 users, Black

After several weeks of daily use, I can confirm that the Garmin Index S2 fully meets the expectations of an active user who wants to track body metrics accurately and consistently.Straight out of the box, the product feels premium: clean design, excellent build quality, and a bright color display that remains readable even in low-light environments. Setup is simple and quick, with seamless Wi-Fi configuration. Unlike many other smart scales, the Index S2 uploads data directly to Garmin Connect without requiring you to open the app after each weigh-in. This is a real plus for those who value effortless tracking.In terms of accuracy, the weight measurement is extremely reliable. I compared it with professional-grade scales and found only minimal variation. As for the body composition metrics (body fat, muscle mass, water percentage, bone mass), it’s important to keep in mind that they are based on bioelectrical impedance. Like any impedance-based scale, the absolute numbers should be interpreted with caution. However, they are very useful to track your trends over time, as long as your measurement conditions are consistent (same time of day, hydration level, food intake, etc.).The real strength of this device lies in its seamless integration with the Garmin ecosystem. All your metrics are consolidated alongside your activity, heart rate, cycling data, and sleep stats. This gives you a complete overview of your health and fitness. You can monitor your basal metabolic rate trends, correlate your weight with heart rate patterns, and track your recovery over the long term—something few smart scales on the market can offer at this level of consistency.The Index S2 supports multiple user profiles. It automatically recognizes frequent users but also allows manual selection if necessary. This makes it suitable for families or shared environments where several people want to track their own stats independently.In terms of reliability, I’ve experienced no connectivity issues, no sync failures, and no crashes. Firmware updates happen smoothly, and the product feels stable and trustworthy in the long run.If I had to mention one downside, it would be the price. It is higher than some competitors offering similar standalone features (such as Withings or Xiaomi). However, if you are already a Garmin user, this is the only scale that offers full integration and makes your fitness tracking complete.In summary, the Garmin Index S2 is a well-designed, reliable smart scale for users who take their health and performance tracking seriously. I highly recommend it to anyone looking to centralize their fitness data within the Garmin Connect ecosystem.

Good bit of kit for anyone who is into fitness slightly tricky to set up but works very well

Had high hopes for this since I have several Garmin devices for running and cycling and they are excellent. All I wanted was to be able to feed weight and body composition data directly into my Garmin Connect account so all my data is in one place. That and allow the rest of my family to do the same.On the plus side the scale is a beautiful object and looks great on the bathroom floor.Apart from that it proved to be useless and I returned it.Initial setup is tricky and my Garmin Connect app couldn't find the device until I took my Forerunner out of Bluetooth range. To get to that point I still had to call Garmin tech support and wrestle with it while I had them on the line. Eventually we succeeded in getting Connect to add the scale.Accuracy. Weight seems to be measured in line with what I expected from my mechanical Salter scale but the other metrics vary wildly from reading to reading. BF% can vary massively in consecutive readings. Even bone mass changes from reading to reading which seems pretty unlikely. The problem is obviously that metrics like BF% and Lean Muscle Mass are being calculated by algorithms based on the electrical impedance data and other information and parameters that you set in your profile. Since the electrical impedance is only being measured through your lower body (there are no hand contact points) it has to extrapolate from that. One of the parameters in Garmin Connect that you need to set is your Activity Level from 1-10 (10 being the most active - 15 hours+ per week of training). Presumably this is feeding some kind of assumption about your upper body muscle mass into the algorithm because making changes to this can massively impact the BF% you get - if you increase your Activity Level then your BF% goes down. Even after adjusting the activity level my experience was that my BF% varied by as much as 5 percentage points from reading to reading which I just don't think is credible.Additional Users. The ability to add other family members as users who could then sync the scale to their own Garmin Connect accounts was a significant reason I bought the scale. Sadly no matter what I did I could no make this work. I invited my wife to become a user which she did. I weigh 75Kg and she weighs 41Kg so there's hardly going to be much mistake between us but no dice. If I stepped on the scale the expected option to choose between us appeared (tap your foot on the scale to cycle through the users). If she stepped on the scale then no such option appeared and she was only recognised as a 'guest user' and no data is kept. We tried everything to overcome this but after multiple resets, deleting her and reinviting her, we couldn't make the scale see her.The nice ability to sync readings with all my own fitness data via Garmin Connect is hardly worth having if the data itself is suspect and my family can't use it as well. Certainly not worth paying £130 for.I am far from alone in having these problems. Troubleshooting this I found a wealth of comments from people with similar issues in online forums devoted to Garmin products.My assessment of it is that the concept is great but there are significant software and probably even firmware issues that need to be resolved by Garmin before this is anything more than a shiny bathroom ornament. Personally I'm going back to my Salter and manually entering my weight readings to Garmin Connect. I'll just have to use the mirror to guess my BF%.