I have the Piledriver in the bridge of my tele, with a Slowhand strat in the neck and it gets a great sound. I am not a real fan of Tele neck pickups (in all the tele's I've ever had [about 7 or 8], I only kept the tele neck in 2 - and one of those is the Black Guard flatpole set).
I think that many people don't realise that you have to know the acoustic characteristics of the guitar before you can tell how it will react to different pickups. Tim is really the expert on getting a sound from BK's. I know many people ask for advice here but unless you really know what you want, my advice and all the others won't match what Tim tells you. I can say that the pickups sound this way in my guitars, but I had a hell of a time finding a guitar that I was happy with the Abraxas set in (I knew that they sounded good from hearing them in a guitar at LGS), but they were not working in my LP's. Once I put them in the Hamer they came alive and worked great.
I have had the Piledriver in 2 tele's and it seems to be sounding better in the lighter gutiar that it is in now.
I know a lot of people also seem to want to get the pickup with the most gain, but that will reduce the tonal range usually. If you then play it through high gain amps you get the 'PRS Nickelback' tone - compressed to hell with no definition or dynamics. I find that the better tone comes from the lower output pickups and the way you play gives the drive.
Then again I am a blues and rock player, and all the classic stuff comes from 7/8K humbuckers or 6/7K single coils, so this might colour my judgement.
As to quality, I have probably have more BK's than most people on the forum and got my first ones in 2004. My latest are coming soon, but the last ones I got were 2 sets of Mules, and the quality is better now than back then. Not because of the workmanship, which has always been frist class, but because Tim has managed to source better components and get the pickups more accurate.
As more pickups are sold, there will be more people who think that they are not worth the money becuase they didn't turn into their hero once they changed pickups. In fact BK's actually show up more of the problems in your playing, but that is because they have TONE. In the end the biggest thing that makes a difference is your fingers. Pickups can only help you get a tone if you can play it in the first place.