My daughter and I both use them and have no complaints other than in shallow clear water the face is a little hard to read. The sync and set-up via the app is super simple and easy to do, just log on- set the computers preferences (meters, feet, 24 hour clock vs 12hr, and the few other things you won't set each dive) then go dive. The fear from people here seems to be the setting up of things via the app, but the only things you set there are things you won't change each dive. The things you set each dive air, nitrox etc are still done on the computer it's self. The charger works great and is easy, we charge it each night before the dive and are good to go. There have been complaints of it being to conservative, but I'm a pretty conservative diver, since my 13 year old is with me, so that's no issue for us. Over all...I like the computer quite a bit. I only wish it was a little easier to read in the shallower bright water.