Chad
Slender Hobbit
I have the + version and it is the best guitar related thing I have bought to date. For $50 this is definitely a no brainer. The looper is great but not completely necessary unless you are trying to use it in a live situation and there are better tools for that job anyway. As a thing to have around the house to be able to create backing to play to on the fly, this think is fantastic. Plus if the blow out the + and you wanted it, you could make your money back at that price.
I plan on using it solely as a practice tool. I'm sure the + is way better, but I'm not sure I'd use the extra features. Definitely not for $250 more for my needs.