In the overall scheme of things, Apple has done a decent job thus far. I'm not sticking up for them or being a fan boy. In fact I have all but one of my Macs running my well optimized SL 10.6.5 and have no plans to migrate to Lion anytime soon.
Yet that said, I did buy a new MBA with LION for two simple reasons.
1) I got it for an unbelievable 20% off via Amazon, plus saving sales tax and shipping. So it was a deal I could not pass up.
2) I was curious about Lion and didn't want to compromise one of my ultra fast, and reliable SSD equipped MBP's or Mac Pro just to test the new OS.
Being around for years using Apple gear, I know better than to expect perfection from a new OS, and that goes for ANY new OS. Not just Apple. Be realistic, and if you are new, be advised that it takes awhile to de-bug an OS once it's in the hands of the public.
Apple will get there in due time. They always have, and they always will.