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I voted for CrystalXP.

- Flyakite:

Mark: 7/10

The Good: Advanced replacements/Lots of extras/Good installer&unistaller/Updates

The Bad: Little sense of incompleteness/Poor AVIs (Default MacOS X)

- Gartoon:

Mark: 5/10

The Good: Funny icons and AVIs design

The Bad: Sense of incompleteness/No extras/Intermediate replacements

- Longhorn Transformation Pack:

Mark:4/10

The Good: Good installer/Lots of extras

The Bad: I don't like any feature included (icons, styles, logon...)/Bad unistaller

- Pastels:

Mark: 6/10

The Good: Marvilla's icons are really beautiful

The Bad: No extras/Sense of incompleteness/Basic replacements

- CrystalXP:

Mark: 8/10

The Good: Advanced replacements/Everaldo's icons are simply awesome/Good AVIs and BMPs/Lots of extras/Good installer&unistaller/Updates

The Bad: Little sense of incompleteness/That penguin everywhere...

- The Last Order:

Mark: 4/10

The Good: High quality icons

The Bad: Basic replacements/High sense of incompleteness (the author himself refers to it as a "mini-shell pack")

- Serenity:

Mark: 2/10

The Good: ?

The Bad: Incomplete/I don't like the icon design

Obviously, all expressed above are my personal opinions. C'mon guys, vote!.

XPize because that's the only one i've really tried

I've only tried 4 of the above, and liked the flyakite Mac OSX transformation pack, the most.

I have got a little bit of all the Packs in my Unattended.

But I voted for the Longhorn Transformation Pack, because I like it the most, closely followed by XPize

i've used 1, 3, 5, 7, 8 and others like Gant2 (this and more can be found here)

mac osx and longhorn interfaces are really average but i personally preffer something more original.

crystal is funny, i still use the msn6 mod also it looks nice as gant2 (gant icons are visually the best, they are well designed and sizes boosted to 128x128).

about serenity, well, i've used the icon theme because the serenity (organical) theme is one of my favorites but it still needs too much work.

i voted for xpize because it's really complete (in all terms) and the most important for me, can be slipstreamed on my unattended cd