I purchased these sandals because Teva is a great name in sandals and because many of the reviews I read said that these are the most comfortable sandals ever.  I also have a pair of Rockport sandals which I like a lot and found it hard to believe that there could be any sandals more comfortable but what the hay, I'm game.
In all honesty, these sandals are not nearly as comfortable as my Rockports.  The strap is nylon and therefore not very soft.  That does not mean that these sandals are not comfortable though.  I wear them all the time and have had no problems other than a little blister on top of my foot near the little toe.
What I like about these over my Rockports in fact is the same thing that makes me like them less.  Because it has nylon straps, it is able to be worn in the water.  Since I love to SCUBA I am in the water all the time and sometimes need to enter the water before I am all geared up.  My Rockports, on the other hand, have leather straps and water is obviously not good for leather.
So, to sum it all up, if I am going to be wearing them for long periods of time or on long walks, I prefer the Rockports.  Otherwise, I like these just fine.