Impellitteri was pretty foolish back when he started out, doing that weak Malmsteen impression without the technique required. Hell, he even did an instructional video, demonstrating licks he couldn't even play himself. I think I read somewhere that he's sorta embarrassed by that stuff, and his playing improved a lot since then. I'm not a fan, but the man's a solid player these days.
One thing I do like is that he got Bonnet for the Stand In Line album. Some crazy vocal performances there, back when ol' Graham had his high range intact. I'm willing to ignore the bad soloing just for the vocals.