Five stars because it's MSG and it's priced right.
However, the songs are not mixed the same as what I had been used to hearing (remixed or not), and even some of the CD song listings are different (Built to Destroy). For a good example listen to Dogs of War -- after the first verse/chorus/solo, one of the main guitar parts is pulled way back and then completely drops out when the vocals start again (and after all we're buying this FOR the GUITAR to hear Michael Schenker, no?). The songs often prematurely fade out at the end during a solo we're used to hearing as well, cutting off some iconic and memorable guitar magic. I would not dump your existing versions of the MSG releases and rely on this to be your "keeper", you'd be missing out on too much of what makes MSG so good.
Note: this release is an IMPORT -- so this may be the mix that was released in the UK, it may be different from what was released in the US, and i'm comparing what I've heard and have become used to hearing in Turk's basement while growing up in the US (on albums and then eventually CDs) to this set.
I still highly recommend adding it to your collection, as well as the UFO Chrysalis Years Collection The Chrysalis Years (1973-1979) -- well worth it.