I bought these 5 weeks ago and haven't worn anything else (on my feet) in that time.  Yeah, some people probably think I'm wearing my bedroom slippers, but they're *so* comfortable.

ADDITION:  I wore these all last summer and really enjoyed them.  I pulled them out of the closet this spring and noticed that the soles (which are barely there anyway) were separating front and back on both shoes.  They're not going to last much longer. :(  I notice that Crocs sells shoes with similar uppers attached to a much more substantial (tennis shoe style) sole.  I may try that next time.