Im growing currently in an MG mixture, and havent seen any bad results yet... tho I couldnt speak on the cough/flavor of the final product as I haven't harvested and sampled. I do know that they are growing great, without stretching, and without having to add any nutes at all. I have recently started watering with a flowering nute (higher P and K), but only every other watering - plain water in between.
And about ammonium nitrate... its part of every form of fecal-based fertilizer on the planet. Just because its extremely volatile, doesnt mean its bad for plants... just means it has a highly reactive molecule. The reason why Ammonium Nitrate is volatile is because as it is broken down by heat, it creates nitrogen(nearly inert) and concentrated levels of Oxygen. Oxygen is highly reactive, and explosive, but the roots of a plant need it to survive.

So, not trying to be a douche and dismiss someone but just because it goes boom when concentrated, doesnt mean it isnt useful in plant nutes.

I havent personally seen pressure treated wood in MG, but because I havent seen it, doesnt mean it doesnt happen.... It also means that they can have quality control issues, but doesnt every company occasionally?

That said, time released nutes are tricky to work with, since most people are eager to add nutes as soon as the serrated leaves have popped. No doubt, though, that unless you leach the time released particles out of the soil by natural means, the taste of the final results would be affected (even if minor).

sorry about the rant.:rastasmoke: I'd say tho, that overall MG is good, as long as they arent fed until theyre close to 12/12 light. If they are fed additional nutrients, a buildup can occur and the plants get 'locked out'. Then its more difficult to 'flush' since the time-released nutes arent as readily flushed from the medium.
:smokin: