I'm still keeping the 4 star review because while these USB issues are annoying they aren't a complete deal breaker and the usefulness of the device coupled with the great software instruments, for the price is still outstanding value

Overall, this is a great value for the price.

Considering the bundled software, I still think it's great value, but with the drop out in connection I would not recommend it for live stage use, only for a desktop studio when you're prepared to occasionally spend a few minutes fiddling with a USB cable.2nd UPDATE:Have had it for about a year now and while I still think the included software makes this a great value purchase, I have noted some problems using it on a mac:- device sometimes shuts down even when it's still connected to the mac via USB.- sometimes works through a USB hub, but other times, just won't power up unless connected to a computer USB

But if you are more focused on composing and want to record chords or melody lines into a software sequencer, this product certainly has great value

The only redeeming value is the included software... there's a lot there to play with and they sound great!