I thought the opposite to this reviewer. I believe Glennie-Smith's music was a hell of a lot stronger than Graziano's. Graziano's arrangement of 'Bonny Portmore' pales in comparison to the version Lorenna McKennit did, and which featured in Highlander 3. The vocal isn't as strong, and the whole piece doesn't end right. It is a very nice piece of music though.
If you listen closely to the music during the film, you'll find that the main theme is the one that Glennie-Smith composed. It's a strong theme and uses the traditional Scottish sounds well in the mix. The only downside to it is that it is perhaps a little too Media Venturish to be really unique. If you listen to the rest of Glennie-Smiths pieces on the album, you'll find that there's a lot more layers to them than what Graziano has incorporated.
The other thing that really annoyed me about Graziano's music is that his synth settings aren't quite right, and if you listen carefully, you can hear that his strings and choirs don't have enough release set to them and as each note changes, it drops away too quickly. He needs to learn how to use his equipment a little better. Admittedly, that probably won't be noticed by the majority of peole unless you have some understanding of synthesis and envelopes, but it really gripes with me. The other downer is that the tracks Graziano composed by himself are a lot weaker than the ones where he has collaborated with someone.
In Graziano's favour however, the Main Titles are really, really amazing!