***5 JULY 2018 Update to 2 Stars***I can no longer recommend this device for anyone who wishes to use the connected GPS function. For the past two months it has been dropping connectivity from my Note 8 sporadically during my runs. On average I lose a 1/4 mile off of each mile. The only solution presented officially is a list of 5 things to check for which are permission options and always conncected features between your phone and the Fitbit app. Many other users have been reporting this issue as well so I will probably end up giving this to my wife who only uses a treadmill and look for a different brand with better GPS tracking. See my new photo that shows this problem through Strava.*** I've had my Versa for a week now and after testing every exercise mode and feature besides the fitbit pay, I can say that this is the best smartwatch I've ever owned and an amazing fitness tracker with great statistical accuracy.I tried the gear fit pro 2 for a week as well and took it back. That watch had poor apps, poor battery life, and constant hr freezing. The Versa on the other hand meets everyone of its advertising claims and I am so happy it does!Pros:-Battery life is 4 days as advertised. ( If you want the best battery, turn off the always connected mode, the watch will only sync when you start a workout or enter the app on your phone.)-HR tracking is accurate and insightful-Sleep tracking is accurate and insightful-Ease of exercise selection, stop, start, pausing, and syncing-Strava syncs flawlessly-Community feature is great and fun-Coach feature is awesome!-Connected GPS for running and cycling is easy and accurate-Heart Rate zones during running and working out is very insightful as you can see effort, intensity, and stages of cardio activityCons:-No Spotify!-When swimming it did not count laps when I used training fins without arm movement!Overall if you are looking for an affordable and stylish fitness tracker for 24/7 usage, get this! I don't like or use the text messages or phone notifications on any fitness tracker so the battery is amazing for me. There are complaints about the setup but it tells you it that it will take 30 minutes in the manual and I've had no problem connecting this and my aria 2 to my account.I've added a video to show how relatively easy it is to switch bands. I used to be a jet mechanic so maybe it's easier for me but: 1) Grab the fitbit with one hand, with the other hand grab the strap while depressing the release2) Seperate the band from the watch by pulling the release part of the bar away from the watch and then lifting the other side out.3)To install: Hold the fitbit in one hand again, the band in the other4) While depressing the release insert the opposite end at about a 45 degree angle(very important for installing the classic band!) to the watch.5)When that end is inserted, move the other bar into place while continuing to press the release. When the release pin is in the general area of its insertion spot, release it and gently wiggle around until it finds its spot and inserts itself into it. Done!Hope my vid helps, good luck!