I like Metallica and that was a bajallion times better (regarding the singing only) than Metallica.
Adam Lambert is one of the best singers alive.
No.
Now, I don't think he is a horrible singer like some people in this thread do, but there is no way he is the best singer alive. He has a pretty crazy range, and thats pretty much as far as it goes. He uses WAY too much vibrato.
I thought the cover was ok, not bad but not really that great either. I don't have a problem with his sexuality either, but I agree that just making out with someone (regardless of their sexuality) during the middle of a Metallica song you're playing on stage is just pretty... well, stupid.