I got the album this weekend, and other than seeing my handsome face in the booklet (I'm the fool screaming), I am glad I have a John Bush version of all those old songs. I think his singing is better and simply more real than Joey's. After listening to it, I did think at times I prefer Joey's part on this, but overall (and this is the only time you will hear me say this EVER), I am a Bush supporter.
As for the quality, it was a bit disappointing. One thing everyone must keep in mind though is that many of the songs were recorded in one take live in front of 50 Thraxholes. So if you think about it, its a live recording. John is not going to hit every note perfectly, Rob is not going to do every four finger pulloff sweep in his solos. But nonetheless, I thought John's voice sounded great, but the drums are a bit unbalanced, and the bass a little low. The guitars sound like good live guitars. Actually the guitar sound quality reminds me of Shadows Fall's Of One Blood album.
As far as Rob vs. Danny, they are two totally different types of players. If I said off the cuff, who is more technical, I would say Danny. He did some crazy crap, but it did not always sound good. It sounded uninspired at times. Its great that he can play a G# diatonic minor 7th scale and then quickly switch to a C# Dorian, but that does not always make a solo. Sure Rob slurred and wahed out some notes, but he's a pretty damn good guitarist...even back in his Fordham Prep days. ;-)
Overall, I recommend people to buy it. Whether you are a big John Bush fan or not, there will be at least one song that you find sung better. And even so, just support the band!
Looking at the CD booklet picture also put a simle to my face because it reminded me that Frank wore a Third Rail T-Shirt at the show, which was a club in The Bronx that my friend's uncle owned. Awesome...