My G&L SB2, a joy to play - neck is somewhere between a J and a P, though closer to a J and the tone is fantastic - distinctly "precisiony" but with more clarity and evenness across the strings. With the pickup volumes turned all the way up it really grinds, but will do Motown thud too if you turn right down and then turn your amp up.
It's light too, which is great - the under-sized body really helps there.
Would I change anything? In an ideal world I'd maybe have the neck a little wider, though not much and I'd probably pick a different colour if I was buying from new, nothing wrong with the colour it has, but probably not my first choice.