have ordered countless times from sp over the past 10 or so years, dating back to when they had the black and green slimey kind of website layout when i believe they were called bulk powders or something.
the products from their own line are generally good with some exceptions where i noted inferior quality. a lot of the primaforce products can be found as exactly the same products under the sp line, but at a much cheaper cost due to the owner's affiliations with primaforce, as someone already mentioned.
unfortunately they have dropped the ball over the past year or so: i have frequently received orders with items missing and/or items i never ordered, their customer service is not what it used to be either. but i mmust say that in the end i always got everything sorted with them, despite the hassles, aqnd they eventually replied and sent the proper items with free shipping and i kept the items i never ordered, too