I feel that something here needs to be clarified:
Many reviewers talk about their T-Touch which was bought years ago. Those are obviously the first generation of T-Touches and NOT the T-Touch EXPERT from this advertisement which cannot be compared to the old version.
The old version had issues especially with water resistance but it was only rated 30 meters which is not considered as a sports watch. The EXPERT has an improved case design and is rated 100 meters even though the touch sensors won't work under water which is explained in the manual.

Also as for the EXPERT and battery replacement: Theres an clear colored insulator disk in the battery compartment and it sticks to the old battery and when you install a new battery without putting that insulator back, the new battery shortens out immediately. This happens when you take your Tissot to a Jeweler who doesnt know a thing about this watch so don't complain when your $15 battery change attempt at the mall goes south. Also, after each battery exchange, the compass and altimeter sensor needs to be recalibrated which is a 1-Minute task but only a authorized Tissot watchmaker can do that and is part of a battery exchange process.

I own the watch which is advertised here and it has never failed on me and gains only one second per month which is awesome!