I just ordered a MB2e yesterday. The promo code "Gummybear" still works for a $25 discount on the MB site. If you order from a third party site like Amazon, there's no product warranty.
I used the Canna Aqua line with my last grow, ebb & flo, and was very happy with it overall. The Boost is very expensive though and it would be nice to find a little more wallet-friendly substitute. My current grow is a 3 gal hempy bucket with Canna Coco with a 2" deep chunky perlite res...
I've got a coco hempy going with 2" of chunky perlite in the bottom for the res under a 900w Mars II panel. Feeding with Canna Coco nutes 2x week and supplementing with Recharge 2x a week. It's been super hot here, but no problems in the tent.
I won one of these in a contest. Like was said above, it's too small for real growing. I use mine as a seedling/clone box. It does fine for that. For what they are charging for one of these, I bought a Mars Hydro 4x4 tent with a 900 watt Mars II LED.