I don't think that I can add much more than I have in previous threads, but I do like mine quite a bit. I've never had an amp like it, so I'm probably easily impressed.
I love the clean channel cranked way up, with some added gain from an OD pedal in front of it. It just sounds badass. And take off the OD pedal and it goes from a nice thick crunchy/clean to a nice fat saturated-yet-still-clean kind of sound, depending on your guitar volume. I think that the crunch channel is pretty good but not terrific, and it's a little more amiable at lower volume settings. I don't like the ultra channel at all, I think that the lower gain channels sound much more brutal than that can of bees.
The reverb is pretty forgettable, but I don't tend to use reverb on this amp anyways. I've never owned the stock speaker, so I don't know exactly what the Creamback adds to the equation. I do love the end result though, I think that it's a great amp in this price range.
The Achilles heel of any DSL amp is that all channels share the same EQ knobs. A good EQ setting for one channel probably isn't good for the other channel. It's a pain if you're a live player. But I'm just a basement dweller so it doesn't bother me.