I've used mine a few times now. i'm no expert, and I've not done any rigourous testing, but there are a few samples around in this thread that should help give you a vague idea.
The HR sounds great to me, a couple of my recordings with it are easily the best I've made yet. How much of that is down to improvements in the recorder, or down to recording in 24/96 rather than 24/48 I don't know.