Quoted from rotordave:
Even Sixx didn't like Vince Neil's singing when he started Motley Crüe (reference Vicki Hamiltons interview on Dean Delray podcast last week) but he couldn't get anyone better so he didn't kick him out of the band. Personally I don't mind the records but live the guy can't sing at all. Awful racket. IMHO.
However the Crue music would suit a pin sweet. Cobble together the 8 best songs (that'd be about it) and it'd work well.
Saw them a few years back , he sang 20% of the lyrics , and even the ones he sang , he sang poorly . Worst live show I've ever been to .