I bought a THC extract cartridge here. They have very good stuff, but I have to give it 2/5 stars because it's a hole in the wall operation that is way overpriced. The staff consists of inexperienced college kids. While the cashier was courteous, he made no mention of a receipt, which 1. he is Required to do and 2. is absolutely necessary if you buy a defective cartridge! Unless you're trapped in SW Portland, you can easily find comparable product for around half the price at other shops. I wouldn't shop here twice.