This one is growing on me as I like what it does to the sound of my Tele. It's not too configurable, but it does a great job to sound like a tube amp. The appearance is good - not reminiscent of any other amps, but that is good, it has it's own look.
There aren't too many features, but you don't need them. The sounds is great and I for one don't feel the need to play with it too much, it sounds great out of the box. It's definitely got tube amp written all over it, and it just makes me want to rock out rather than do anything else. Having said that, it also has other uses, and I've used the out of phase sounds on my single coils with the gain turned down to get a really great sounding funk groove going.
There is a manual on the website, but I haven't had any contact with the company. It's stable and all you need to know is where your guitar lead plugs in.
As a free version of the full product this definitely gets a 10. I'm considering buying the full version which is a steal at $79.