I have a set of the GFS soapbar goldfoils on my last project guitar. They're not the Teisco-style goldfoils in construction, they're really P90s in that cheezy goldfoil trim. Good sounding pickups, I'd bet that the GFS P90s in traditional trim would probably sound similar.
As for GFS, when they hit, they tend to hit home runs. But you do have to be a little careful, because they sometimes have duds. I had a pre-wired harness I bought from them that sounded great but had a horribly microphonic pickup switch. Swapped it out with a higher quality switch and now it's fine.
Considering how inexpensive the GFS stuff is, I still call it a win. Just ignore the outlandish "everyone else's parts are crap" rhetoric.

