First of all, to clear the air, Limp Bizkit's record label (not Limp Bizkit, and not Fred Durst), Geffen Records, made the band release this album (as part of their contract). So this may be the world's most hated rock band, but don't blame them for this retrospective.
It may have taken them six years to do so, but this album proves that Limp Bizkit have evolved (ever so slightly) from a somewhat raw, amateurish-sounding rapcore band (in 1997, when they released "Three Dollar Bill, Ya'll") to a somewhat mature rock band (in 2003). They sure haven't evolved greatly, like some bands, but at least the effort is there.
"Greatest Hitz" features all of Bizkit's, well, greatest hits. The first fourteen songs are all singles, and the majority of them were hit singles. This means that "Greatest Hitz" has all of the songs you'd expect to be included in a Limp Bizkit retrospective (like "Faith," "Rollin'," "Nookie," "Break Stuff," etc). There are no surprises, here. And while some (okay, many) people will cringe at the thought of listening to these songs again, it just wouldn't be a complete greatest hits album without them. Granted, there are some terrible songs on here (see "Rollin'"), but, whether you'd like to admit it or not, there are actually a couple of songs on here (i.e. "Re-Arranged") which are rather mature, and there are also some (i.e. "Take A Look Around") which show that the band members do have some musical ability. Plus, tracks like the aforementioned may not be the best written songs this world has ever heard, but they are kind of fun to listen to! And at least (with the exception of "My Generation") there aren't any absurdly/infamously profane songs on here (like "Hot Dog" or "Full Nelson").
As far as the last three tracks go, "Why" and "Lean On Me" are "Results May Vary" b-sides, which were scrapped in favor of "heavier" songs. If you enjoy that album, you should eat these songs up. Lastly, "Bittersweet Home" is a somewhat soft and peaceful cover of Motley Crue's "Home Sweet Home" and The Verve's "Bittersweet Symphony."
I gave this album three stars because I would give Limp Bizkit's career (up to this point) the same rating. 2000's "sell out" album, "Chocolate Starfish And The Hot Dog Flavored Water," is definitely their worst studio release, but I'd bet that you can't tell that by listening to the songs on here that represent that album ("Take A Look Around," "My Generation," "Rollin'," "My Way," and "Boiler").
I'd say Bizkit's most mature, serious, and focused efforts are 2003's "Results May Vary," and last year's "The Unquestionable Truth, Pt. 1" EP. (But, unfortunately, none of the songs from "T.U.T. P. 1" were included on this compilation-probably because frontman Fred Durst wanted to keep that an "underground" album.) So, this is a band that has definitely had a spotty, sporadic career with a fair share of ups and downs, but, right now, I think they're in the best shape they've ever been in.
This compilation, as a whole, is quite solid, listenable, and even enjoyable. The only songs I would like to have seen on here that weren't included are "Hold On," and a few "Unquestionable Truth" cuts. It's not great because the songs aren't great, but it's not bad (and definitely not as atrocious as some of Limp Bizkit's stuff, like that remix C.D. released back in 2001.) The first fourteen songs are great for a casual fan or newcomer, and the last three songs (the rarities) are good inclusions in the hardcore fan's collection (if there are any of those left).