Access TI was over USB 1 (or something with zero bandwidth) back in 2008, It was unstable
But now its rock solid and still works fine on PC. It did take some tweaking of code to get multi channels in FL studio but has worked fine for me since 2008. I think it was the first of its kind, definately a shame Access have just walked away from development. Its still a favourite synth of mine.
OB had some teething problems out of the gate but works fine now, It would be like using OB when it was first released and making your mind up that its just broken and always will be.
Also i think Electro Harmonix have ventured into OB territory with the new Big Muff, not sure how its fairing but.