Couldn't stand being tired all the time. Didn't do much for me in the way of fat loss. I prefer ECA to Superclen. Regular Clen is ok for a couple weeks!
Its a pretty weird product. It worked well for me as well as other people on this board. Will give you sides like clen (shaking, headaches....) but also after a few hours, tired like a dog.
I take superclen before I go to bed. I work at night and sleep during the day so it helps me sleep. I take ECA during my awake hours because of the tiredness the supeclen gives me. Seems to work ok for me.