Tribute and AB humbuckers: great pickups, great service
A few years ago I bought an Ibanez Artist AR420, my first Gibson-type guitar. It's a very good medium-price instrument that's somewhere between an LP and an SG in weight, wood, and tone. I found the stock Ibanez Super 58 Custom pickups to be OK but not great - too modern for my blues and classic rock tastes, not as sweet, open, and articulate as I wanted. So of course I spent endless hours on the web researching replacement pickups (which can make you nuts). I liked what I read about Jeff Shepherd and Sheptone: the sound of his PAFs, the reasonable pricing, and that he's an small independent US shop. He answered my email questions promptly and we talked on the phone once as well. On Jeff's recommendations I ordered a Tribute set. I found the neck PU just about perfect but the bridge PU was a little weak in comparison (every guitar is different). I contacted Sheptone again and on their recommendation I returned the Tribute bridge and they sent me an AB to try, no additional charge. The AB bridge did the trick. Still clear, open, and articulate sounding, but in this particular guitar a better match for the Tribute neck. I had originally planned to try Alnico 4 magnets in the Sheptones, since I tend to prefer that EQ and tone. But Shep's degaussed A5s sound so good that the A4 magnets are likely to stay on the shelf.
I need to add that there was a slight mechanical problem with the AB bridge pickup they sent me. When I notified them they sent me a free replacement within days, and suggested that I just keep the first AB as a spare. Excellent customer service, and excellent pickups!