I did it once, from Starter fluid. I used the method where you mix it with water and all that to get some of the other crap out.
I liked it. At first I felt sort of drunk, then I had some auditory hallucinations, then some visual distortion (wouldn't call it hallucinations). Things were funny, and I couldn't feel my brain for a bit (hard to explain).
Although the experience was actually enjoyable, I wouldn't do it again just because it isn't safe, like everybody said. I don't think I suffered any permanent damage, brain or lung wise.