Nah, it can be quite weird. Even a simple task like drawing a straight line isn't exactly obvious.
Having said that it's a useful tool and is free. I usually have it installed on all the machines I use. I do still use MSpaint for some quick cut-paste jobs but anything more complex and I bring out the GIMP.
I've used Photoshop in the past and it was more intuitive and probably still is. But anyone who isn't a professional isn't likely to want to fork out.
Biting the hand that feeds IT
