At best this CD as a whole is satisfacory. It might have been better if they just released an edited collection of the guitar solos (joking, but only just)
Most songs are acceptable and enjoyable. However, the Fergie song tries hard but ultimately wears thin fast, it will appeal to 12 years old boys and shift a lot of CD all the same.
The Adam Levine song should have been included on his own respective solo album so out of place is it here. I understand the need to appeal to a broad audience for commercial reasons but the aforementioned artists are an amusing novelty at best and superfluous at worst.
Maybe it is just me but the Myles Kennedy guy has a really annoying whiny voice at times on his 2 tracks, is he always like that? At the same time the songs he sings on are decent rock tunes if a tad unadventurous.
Kid Rock? Woeful, standard, run of the mill radio rock dross. How does he get away with it?
Other than that the Lemmy, IGGY, Astbury, Ozzy,Andrew Stockdale (Wolfmother), M Shadows (Avenged 7 fold) and Chris Cornell songs are solid fun rock and roll (metal in the case of "Nothing to say") sung for the most part by Real rock and roll artists with pedigree and credible back catalogues.
The track "Saint is a sinner too" sung by relatively unknown Rocca de Luca is a surprising gem which many would not have expected.
The sole instrumental "Watch this" features Dave Grohl on Drums and Duff McKagan on Bass. Wow. This is a thundering track with great perfomances all around. Apparently Dave Grohl refused to sing over this track and it is all the better for it sounding like a cross between Metallica and Queens of the Stone Age. More please.
Ultimately you can rip this CD and discard the tracks you don't like but I can't help feeling if they trimmed the fat (Fergie,Adam Levine,Kid Rock, one of the Myles Kennedy tunes) it would have made for a far more cohesive album.