I have one, and it's really really comfy for my palm grip. I'm about 2 months in, and so far no problems, other than the fact that it won't work with OS X even though people have reported that Func told them it should.
Hopefully I got a good one, cause I don't want to have to find another mouse if it craps out.
Hopefully I got a good one, cause I don't want to have to find another mouse if it craps out.