my 2 cents.. the eca stack is untouchable in regards to its fat burning capabilities. that is why its banned and illegal in some countries and most competitive sports (mostly due to fatal abuse). but if u use it responsibly there is nothing else out there that will come close. it is also 100x cheaper then the other sups u mentioned, just buy the ingredients on their own. generally when ur taking a fat burner, and especially with an eca stack u want to be eating a super clean diet. tonnes of fruits and veggies and water, along with all ur lean proteins etc. make sure ur getting all ur vitamins and nutrients (from fruits and veggies) as the thermogenesis will be burning everything u consume. if it were me I would not take the stack unless I had a solid multi-vitamin, some veggie greens (or similar sup) and a quality fish oil (mornings) OR EFA softgels (b4 meals). last thing.. too really get the benefits from this stack u probly want to run it for about 4-6 weeks, taking a week off every 2 weeks (ie 2 on, 1 off, repeat). once u know ur tolerance, increase ur dosage as u feel necassary, never going above 400mg caffeine, 50mg ephedrine (2 doses/day). taking aspirin is disputed so do ur research and do what u feel comfortable with. i would consider leaving it out but only if ur taking the fish oils, as it will tax your liver, and that is the last thing u want b4 a PH cycle. i would also wait 2 weeks b4 starting ur PH cycle following this stack and preload all ur support supps ie. Life Support while continuing the fish oils MV and veggie greens into ur PH cycle. hope this helps bro, dont stop reading and keep askin questions.