[This review was collected as part of a promotion.] I was excited to try the Series 7100, but it wasn't worth the extra cost for me. The cleaning doesn't feel much different from other Sonicare brushes I've used, and the app adds very little value beyond confirming you've brushed for the recommended time.
I was also disappointed that it only comes with a USB charger, which isn't very convenient. Thankfully, it works with my older Sonicare plug charger.
Overall, it's a good toothbrush, but I could have bought a cheaper Sonicare model and been just as happy.