Clen is great stuff I have used it a few times. I Heard from a doctor that you should not go to much higher than 100mcgs b/c at that dose it can cause problems with your heart (heart growth). He also stated that it should be ramped up and ramped down for the best results.
I used the Clen with T-3 and it was magic!

I sheaded fat like water weight.....it was amazing! Oh and I could eat just about anything I wanted while I took these two together.
I think it is a great product, you just have to be safe as with anything.........moderation is the KEY!
Oh I got really really really bad craps as I got higher with the dose. To combat this problem I purchased Taurine in power or crystal form and had to mix this in protein shakes and sometimes had to put in directly in my mouth if I got a crap like "charlie horse". I got these at night most of the time in my lower legs, but sometimes I would get them during the day in my uper neck near my head and in my uper back. MAN DID THOSE HURT BAD.
When taking the Taurine it is best mixed with some simple carbs "sugars" like gatorade powder or better yet grape juice b/c high in sugar.