I do, but I'm not convinced at all yet.
I switched it on, which took a few days and many failed attempts (not on my part, just the matching failed and needed restarting), and having nothing on my iPhone was a pain. So I switched it off, synced, and switched it on, to get my stuff back - but probably 25% of my albums have varying amounts of songs missing, and I can't work out why, and I mostly listen to my music when I'm outside of wifi so I can't fill the gaps, then I forget when I get home.
It's quite a lot of faff, and I'm not really sure how good it is yet. There's basically nothing in the way of instructions because it's supposed to just work on its own, so...
Yeah, not convinced yet! I keep meaning to sort it all out but to be honest.. I might just switch it off.