When on the velocity diet, the HOT-ROX seemed to help a little but definitely did not remove any hunger pains. I've tried phentermine, and other stimulants and they work to blunt hunger very well. I could never get to sleep on them and they require prescriptions, so it's not really fair to compare them to OTC stuff.
I've lost more fat and less lean body mass while on HOT-ROX, and the latest stuff seemed to give me fewer jitters than the early stuff.
Good Luck on your leaning endevors