Easy to setup, charges incredibly quickly and lasts a long time (between charges). Physiological measurements are pretty good and even though bluetooth disconnects if you go too far from your phone, it reconnects and syncs easily. The app itself is ok, needs a bit more work in terms of units, time and summary data as these are not consistent and some just don't make sense.
Would also be awesome if there was a way to download data and/or link to other health apps/systems.