I changed 2 humbucker pickups at sweelee once.. i wasn't satisfied with what they did. The wiring inside was messy, and they didn't fix up my middle pickup properly - there wasn't sound coming out from the humbucker-mid pickup positions. A few months later i changed the middle pickup at yamaha (find Beez, nice chap), and he did a really great job, threw in a push-pull pot as well, and refitted all my electronics for me (eg. my pickup selector switch was rusty). But it was a little more costly, about $30, but quite worth it.