Bro, I also just started running QV Stan 50 for my contest prep and made the mistake of doing a couple lower quad injections on Sunday. Well, it's Tuesday night now and I still can't hardly go up or down the stairs. Hurts like a frickin bitch! Definitely won't do quads anymore. I'll stick w/ the delts, tri's, and ass for the Winny. But, as far as quality goes I'm not for sure yet. First time using this type. All there other gear seems to have worken great for me though. Just got off the Bold 200 and Enan 250. Great stuff! You should be cool. And by the way Quad. I heard that I might be seeing you here shortly. You aren't happening to be preparing for the Ohio State BB Championships are you? I'll be there myself, probably coming in as a middleweight. I'm looking to do some damage this time. I had enough of the bullshit. Good thing I won't be in your weight class, he, he. Anyways, maybe I'll see you there! Good luck with your contest prep and take it easy partner.