Won't work in sandals
This is very comfortable in my shoes/houseslippers, but will not stay in my sandals, which is what I was looking for.  It didn't even stay in my sandal long enough for me to leave the house!  If I can find a clear, longer insole and can glue this to that, then it might work.  But as is, it's just not long enough to stay in sandals.
Rating: 3 stars