I had a Creative 32x...died, got replaced with a 36x which also died.
I took the 36x back and they had to send it away because they had no creative's in stock or something....
Well I didn't want to wait 3-6 weeks or whatever for the return...so I bought a new 48x Creative (at a different store)...that was dumb... My 48x creative also died and was replaced by a 52x...
By this time my 36x had come back to me, and was a new 48x
So now I have a 48x and 52x creative. I put the 52x in my system and gave the 48x to a friend. Both are dead now I had the 52x replaced again and my roommate has the new 52x....(I moved away for a co-op term)..
That's a 32x, 36x, 2 48xs and a 52x. All in the space of about 18 months.
Don't touch creative drives.
Edit: can't comment on Sony, never used their CDROMs but I would imagine their's is probably fairly high quality.