I have been using Five Ten products on on off for the last 12+ years. Doing a very quick count I have found that I have gathered a number of Five Ten products, including climbing shoes, mountain bike shoes, approach shoes and now the Five Ten (5.10) Water Tennies.
A number of years ago I used the Nemo shoes for both whitewater rafting and kayaking, I found the grip very good even on greened up concrete. But I could never of got into my current play boat whilst wearing them.
So how do the Water Tennies fair up. The design is low profile and as a result I can easily get in my creek boat and play boat without any issues. They are close fitting and have enough height in the ankle to help protect the socks on my dry suit from rogue stones. In fact they remind me of old style climbing boots in many ways. They have a fine mesh construction so the little water that does get in can drain very easily. I have went half a size up to accommodate my drysuit/socks which has worked well. From that I believe the sizing is pretty much spot on with “normal” shoe sizing.
I have scrambled up wet rocks, concrete, grass and have even had a swim whilst wearing them and to be honest never thought about the fact I was wearing a pair of boots. At this stage I cannot fault them, fit, construction etc is spot on. Only time will tell if they will take abuse week in and week out.