How are any of you even considering Dragonmint??? They have not released one single ASIC yet. Dont be surprised if this company goes under and runs away with everyones money!! Very risky. Every time Bitmain come out with something they release news that they have a better one but nothing in production yet....
There's plenty of proof out there that at the very least their 16TH/S BTC miner is legit, and philipma1957 is waiting on a demo unit that he'll review once he gets it. A few pages in this thread should get you caught up. Starting from the most recent should help the most; everything they've mentioned about that particular miner makes sense, including the part where they mention the miners utilize AsicBoost to achieve the efficiency they advertise. They seem somewhat reputable as of now, but there
is still some risk involved. It's not nearly as bad as when Halong only had some blurry videos of their miners hashing away a few months ago, though. I personally find it extremely unlikely that Halong's a scam.
https://bitcointalk.org/index.php?topic=2443327.