I hate T3. It is horrible ... and did NOTHING for me. I had better luck with Thermorexin. I also think Clen is way overrated too.
On T3, I started low and ramped up. Eventually, I started feeling dizzy, nauseated, and came within seconds of passing out seveal times. My heart constantly raced and I was ALWAYS tired - working out was almost impossible.
Oh, and I lost no fat either.
Clen was better, no bad sides, but I lost minimal fat.
On T-Rex - it was awesome. I think this is hands down the best supplement for cutting fat. Of course, diet and training dependant too.
Illegal does not equal better.