As a large man with serious clinical chronic pain, I had to double the recommended dosage levels. The product works very well for pain relief, but the duration of relief could be longer (now 3 hours or so). It is extremely easy to use.
As a large man with serious clinical chronic pain issues, I found that pain relief came only at double dosage levels and that I would prefer an even higher concentrate. PSAccess service was excellent, as they obtained the product for me overnight.