Ag-guys got some very good quality products, and I use them all the time. Well, sincerely not all the time, but many times. For me, they have a quality that is very similar to sarms1 products, so I usually order my stuff either from one, or the other company - depending on what is more convenient to me in terms of logistics.
One thing you got to keep in mind with the stuff from ag-guys, is that many times you need to lower your normal dosages, because their products are properly dosed, and are hence quite more potent than similar things from other companies.
For instance, I have already seen many threads of people using their cialis, and having excessive boners because they used the same dosage as with other brands, and they did not take into consideration that ag-guys deliver high quality that does not require high dosages.