I currently have a TG-850 for snorkeling, which replaced a TG-610. Image quality in general is so-so by photography standards (noisy in anything less than bright daylight), but superior to "action cameras". There are compact waterproof cameras with higher IQ (TG-3, TG-4, the top of the line waterproof Panasonics) and there is the waterproof Nikon-1 AW1 which is in yet another class, but given that all of them will eventually leak or suffer condensation damage (frequent changes between humid tropical air and cold water can be just as damaging as a leak) and usually aren't worth fixing once sea water got into them, I stick to reasonably affordable ones.