I tried DMAA in the form of Mesomorph and Dust Extreme and Riot,
I also have 2-3 servings of Chaos and Pain's Ferrox Amped, Amp Citrate i feel gives me more of a power boost without the light headed feeling that i get with DMAA based products.
Also my 1st Pre workout i ever tried was the Original Craze, the spiked version so the bar was set high from the very start for me. i had the last tub before it was discontinued over here in the UK only ever tried grape version and found it tastes quite good.
DMAA when i 1st tried it in Mesomorph was great, better than Craze and almost as good as AMP Citrate based products for the power boost which i mainly notice on leg days, the only days i use DMAA to prevent tolerance build up, I also found that after taking a break from DMAA the effects are not the same as the 1st time i used it.
I would order them 1st DMAA, 2nd AMP, 3rd DMHA and 4th would be a high dose of caffeine in terms of performance boost effects.
Also i have never tried the original Ephedra or used Ephedrine HCL or other forms in my life so cannot compare to them, i am interested in them but am unable to obtain here in the United Kingdom.