I have an original replicator. With a little practice, you can have much nicer results than the 'lumpy prints' that you describe. Also, ABS is really easily sanded and is quite solid if you want professional looking parts
I'm curious what actually useful parts you've made from it. I'm not sure I have ever had a problem where the solution was a part that I could print on a 3D printer; but maybe I'm not being imaginative enough, so I'm curious what other people have done with it.