Saltwaters seem to really divide people. I honestly find them the most comfortable sandals I own because, as a PP said, they are almost like barefoot shoes. Absolute heaven to wear for me, I prefer them to my birkies and AGS which are comfortable but seem to tire my feet more after a long day walking.
On the other hand I have a pair of fitflops that I only wear when I know I won't be doing a lot of walking. I hate that the weird big sole disconnects me from the ground, it's like walking on giant marshmallows and feels as unstable as that suggests. So worse that just uncomfortable (although I don't rate them for comfort either).
Shoes can be very personal and if you don't get on with Saltwaters that doesn't mean I'm lying any more than those who rate Fitflops are lying.