Earlier quoted context omitted.
Gimp works great. The worst thing about it is the lack of high end YouTube video tutorials. That's what you're really paying for with Adobe, I think.
Having used Gimp and Photoshop fairly extensively, I'd agree that Gimp works, and it has the features that Photoshop has (for the most part). However, there's quite a bit of user interface issues with Gimp that make somewhat simplistic activities rather irritating. Gimp kind of has the Open Source issue where it has tons of features, yet there's a large wall of complexity, zillions of little fiddly knobs to tweak on…
IMO Photoshop is just simpler because people are usually used to it. In reality Gimp always had a much more reliable UI