I'm running the TF locker in the rear axle. I have at least 5K miles on it and have had no issues so far. However, I purchased my locker through Nicemotors on eBay. It came assembled in carrier with new side bearings. So I can't comment on purchasing the locker through PICORP or the quality of the product he sells (assuming it isn't a non-TF locker). And I didn't have the opportunity to flub the install in the carrier...

I did purchase my 5.38 R&P set through PICORP. I've had no problem with those, thus far, even though I did the install myself. If I recall correctly, there were a few blokes that had trouble contacting PICORP for awhile after I had purchased my R&P set. Perhaps that implies some inconsistency in his quality of service? My experience was satisfactory. I'll leave it at that...