The electronics are of good quality (e.g. CTS pots, Switchcraft jack) but check that the pots aren't 300k or such, quite a few Gibsons (especially SGs) have these in and it makes them dull and dark.
BKP have started supplying 550K pots which help guarantee that even if you get one of the slightly lower resistance ones due to manufacturing variation, it'll still be 500k or so.
Personally I'd also suggest new strap buttons as the Gibson ones are tiny and just asking for an accident with that big body!