how good is a badger sotar?

Very nice detail airbrush. Badgers best ever, in my opinion.

But since it is specialised for detail and retouch work, it isn't something you pull out to base coat anything larger than a figure. It's just not its purpose.

I could probably survive with one as my only detail airbrush, but I like my Olympos Microns better.

I put it in front of the H&S infinity, though.

I like it a lot. Took me a while to get used to it, hadn't used anything with nearly that fine a tip before. It's very responsive, takes hardly any needle movement at all to get paint flowing. Maybe it's just me but I think mine sprays better with the unprotected air cap, the one without the little arms. It's a pretty cool little brush, once you get used to it it's like writing with a fountain pen. Makes freehand camo in 1/72 fun. 

Tony