Pherone generously sent me their M-11, M-15, D-17X and W-9 pheromone products for testing. You can read the description of each product on the Pherone website. From what I understand M-11 is the lowest in Androstenone, M-15 has a bit higher androstenone, and D-17X contains the highest amount of androstenone, while W-9 is a copulins based product. Since I received these products I have been using them exclusively to perform a fair test. I had earlier tested V-5 from Pherone and found it to be a good mix with some attractive properties. It was pretty similar to WAGG, sold at love-scent. Although one notable difference was that WAGG had a consistent, extreme beta-fying effect. It really lowered you few rungs on the social ladder. Although V-5 had similar mellow properties but it was attractive and didn't reduce your social standing. I like the alcohol dropper delivery of Pherone products although it is hard to get a consistent dosage. Sometimes as you tip the bottle nothing comes out