I have used LTL Deca and Medistar winstrol. LTL deca, smooth, no pain, good results. Medistar winstrol was an awful experience. Every injection was extremely painful for 4-5 days after each shot, and one in my delt even became swollen and infected, had to stop after 1 week. I know water based products tend to hurt, but definitely should hurt like that, nor become infected. Cant speak for their other products tho.