I am finally over my planter faciitis but want to take no chances it will be back.  I love my Fit Flop thong sandals and wore them all summer (which I credit for helping get rid of the planter faciitis).  Since socks and thongs sandals were not cutting it, I looked for slippers to wear around the house (I have wood floors) that would do the same as the Fit Flops.  I must say that the look of these does not thrill me, but I finally sprung for the $69 and got a pair for myself and my mother who had the same issues.

They feel cushy like the Fit Flops and fit exactly to size (I am a size 8), but my feet sweat in them and the insoles are plastic like the Fit Flops, and I feel the need to wear socks to absorb the sweat (not exactly what you want as a slipper.)  The outside fabric is pilling a bit too so I don't know how it will wear (I got mine 3 weeks ago)  Don't know how they would weather as street shoes.

Until someone else comes up with a good alternative, the $69 is worth it even for slippers, given how much pain I felt in my feet last year at this time without them.