Sorry few months old but have to disagree....what we have is a watered down/bunk version of DMAA being used by Hi Tech. Things don't hit like they used to because the same ingredient/s are not being used. Everyone notices it, all those shi*ty Hi Tech "reformulations" i.e. Mesomorph, etc...as soon as grubby Hi Tech got their hands on it....it started to s*ck. Everyone was like "WTF"?
So to me...it's not years of use...you had great products i.e. Meso hitting hard then sh*t Hi Tech comes along, fcks up the entire DMAA industry, tries to buy all companies who produce pre's with it...and replace the DMAA with some watered down sh*t ingredient or fake DMAA.
What's even worse....supposed "consumer" companies like Stack3d or PricePlow are too big of cowards to have Hi Tech's stuff tested for purity and accuracy of the DMAA claims. Guarantee if they sent one of those POS Gaspari SP250 with "70mg of DMAA" you would get nothing that sht was so weak.