I am a fan of EQ (boldenone undecylenate) at around 800mg. I use it probably 2 out of every 3 cycles. It has low sides, significantly less aromatization than testosterone, great bump in endurance due to RBC and HTC elevation that surpasses most other steroids, and it makes me eat like a horse...after all it is an equestrian steroid. I think that it is an amazing drug for gaining size simply because of the appetite increase. If you are also using something like Anadrol 50 or Dbol, it can greatly help in offsetting the appetite suppressing effects of those drugs (that some individuals like myself get). However, for that to work you must not use the oral at the beginning of your cycle but rather at the end so that the extremely long undecylenate ester has had time to break down and saturate your blood with the boldenone.
These days I run shorter cycles than I used to. That being said, I am going to be utilizing bold cyp instead of EQ so that I get more weeks with optimized levels. Running EQ on a 10 week cycle just isn't very efficient. I know of a source or two with Bold Ace, but I hear the PIP is killer and it is pretty pricey.