I have used them off and on over the past couple of years, I started with them when they were new and there where not that many other company's selling peptides at the time. There customer service is bar none and I spoken with the owner directly back then so I figured I couldn't go wrong. But some reviews you will find say they are hit and miss at times meaning some of their products maybe under dosed but they go out of their way to correct the problem. So far after these couple of years I have no complaints and the shipping is 2nd to none. But also I never compared them to another peptide source, they are hard to beat with their pricing and points system. I have come up on another source that comes highly recommended I am going to give them a try and compare the 2 companies. I just made another order from BS, I ordered LGD so I will let you know how's the quality..