Preface: I was not sponsored in any way. I bought the EveBra myself after trying other methods with decent success (See the Holy Wow thread in MsM).
A) It's expensive!!! 2k US is a lot for anyone.
B) It's worth every penny. It's so much more comfortable to wear, even if their bras are too small/ uncomfortable for male chests, as cones alone than Noogles even with their silicone rings (which ripped easily). I work the silicone skirts over my breasts and the pump latches. If I try to use the bras, they're too narrow and, even though they have extenders, they're just not comfortable.
C) The pump itself adjusts the suction constantly. Gone are the angry red rings from my beloved Noogles, again reference the Holy Wow thread, replaced by actual growth. That's where the majority of the money is spent and it's worth it.
Overall, if you're serious about non-herbal breast growth and you want serious results go with the Eve.
Even after a couple of days I can tell this is a game changer. I have worn them overnight every night since, and even during the day when I can. They're that comfortable. The main difference is that, when I visited friends for lunch, the wind was blowing and I had to pull my shirt away constantly to avoid exposing myself even in a button-up. I didn't get that from Noogling or using my Paruu's.
This post will be updated as I progress.