My experience is mixed, due in large part to Onyx 10.
There is now an update which we've yet to install (waiting for it to slow a bit to perform this update).
The take up system is pretty flimsy. Worse, it will abort a print if problems are detected in the takeup. Cores tend to spin freely on the crappy core plugs, which in turn aborts after so many seconds of the motor turning and no material being taken up (sensed by an electronic eye). A member here helped out with a trick of putting rubber bands on the plugs so they grip the core tighter.
The loading system is just awkward. Nothing really specific to note... just awkward.
We do quite a few wraps, and have now done about 7. Most of which involve short term race wraps (Funnycars, dragsters, indycars). We use Avery 1005 EZ for most wraps, and our guys tell us that it tends to seem a little more aggressive than solvent prints. We're thinking maybe the heat is affecting the ez texture in the wrap. So we're still adjusting heat settings. I have nothing long term yet (We have had this machine since January). It does stretch/wrap similar to solvent prints. (It doesn't crack or anything goofy. We actually purposefully stretch sample prints to test this prior to purchasing as well).
I've noticed some slight waviness/warping with backlit film materials, using the proper profiles. We don't have enough experience with films, and heat settings playing on it yet.
We haven't had alot of success printing on metallics.
From the get-go, we had issues with print errors due to onyx. So we've been baby stepping this thing quite a bit, relying more on our tried and true jv-33. The goal is to become more dependent on the hp.
At 600 10p, we get about 5"/min print speed. As stated earlier, this is more than enough quality and speed for wraps for us.