I don't doubt there are better recordings of the material elsewhere, but I don't own any of this stuff so I'm pretty pleased with the set. Couldn't really pass up having it all in one place. I can always get other sets in the future. It'll take me a long time to digest this set though, so probably won't delve into another big classical set for a while.
I don't mind composers who have individual styles. Makes it easier to tell them apart, and sometimes their unique approaches make for interesting spins on the material you might not get elsewhere.
There's no Bach on this set so I'm in the clear there. There is mozart and haydn though.