The guitar is awesome - really enjoyed the music. The singing, as you say Monica, is a whole other story. I don't find it too hard to take, but why they chose to sing it so high I'll never know - although the lead singer can certainly hit those high notes !
Can't agree with any criticism of the MMM vocals, he has a spectacular voice! I also love the way that, in contrast to Yngwie's '...Gimme your love', the MMM guy throws himself with such gusto into the lyrics as they were written.
I don't find anything wrong on the Money Money Money vocals... That singer is fantastic. The metal covers of ABBA songs have always intrigued me a lot, don't know why. At Vance's covers are my personal favourites, especially The Winner Takes It All. There was a time when I even cherished a heretical thought it was better than ABBA's original :-) But of course it's not... Nobody will ever sing it better than Agnetha, even if this guy is very very good.