First of all, this is not the type of footwear I normally would wear.  I hate thongs, and only wear sandals that I guess are the 'adventure' type, occasionally.
These feel OK.  I'm a heavy guy, I'd feel better if the material they were made of was a bit more dense.  I'm not sure they are going to last very long....BUT...I don't intend to wear them outside much.  I never thought I'd pay this much for a pair of plastic flip flops!