I am not a guitarist. But I do record them often. And I also have a 24 fret 6 string bass, which sounds like a guitar near the top of the fretboard. So I bought this for recording.
When I plug this thing in, I can get really great tones out of it straight away. It sounds fantastic on any settings (apart from the EQ, which I always leave flat, and EQ ITB instead). There's no harshness which you might get from digital FX. (Not that digital amp emulators are bad, but many of them just use waveshaping instead of proper circuit simulation). And it's always better to record through a distortion effect instead of adding it afterwards.
I can also get great distorted bass tones out of it too. If I want to get a Motown distorted P-bass sound (where the distortion becomes invisible in the mix, but helps the bass stick out) it's very easy to dial in.
I do wish this had a parallel dry output though. I know there are other SansAmp models which do this, but it didn't have many options. So I just use an active signal splitter before going in to record the dry signal too.