I had concerns that the quality of my burns were degrading, so I tried a few different options with my 1633S.
I have been using BS41 since it came out, seems very consistent, but I figured I'd back grade to BSOS and check out some burns just in case it was the BS41 causing me trouble.
BSOS right away gave burns that looked worse with a scan than with the BS41, not good, and I really think it's maybe the "worst" option.
I was reluctant to try a patched firmware, but I gave CSOM a try, the one with all the patches red led etc, and I got to say I like it fine so far.
The question though is if it's as good as BS41 or better?, so far I'm not sure it's much better, but then it's not worse either.
Still working out all the in's and out's of scanning and testing DVD's though, but really, I don't think you can go wrong with BS41 or a patched CSOM, I'm keen to see how things go with the CSOM burning, if nothing else, I kind of like that it now shows red when it's burning, always felt wrong seeing a green light when your burning a cd/dvd...