Edit: On the plus side, if they hold to their Miner Protection Plan, anyone who ordered a 80GH/s to 190GH/s (assuming they really are just underperforming at 160GH/sec) miner are already entitled to a free upgrade. Wonder how they're going to manage to handle all of that. They seem to barely be able to keep up with the orders they already have.
Um, ROI is not $0 until the miner power-use/cost is less than yield of BTC. I don't think those miners will be $0 ROI for years to come. (They don't mention ROI time, or initial purchase investment, so I assume that is not in the agreement. It reads as "operating ROI", which I am sure they will clarify, when that time comes.)
Even a Radeon 7970 video-card still makes more BTC than power it consumes, via alt-coins value in BTC. (Actually more than most of these GHs ASICs at times.)
I am only getting an ASIC to fill the gap of all the new coins coming-out for sha-256, which are only worth mining with the latest ASICs.
To the other comment about KNC... KNC has stopped taking orders, and they still are not delivering anything for three to four months, from now. (Another month or two, and they may start taking orders again, so AMT is your only choice, besides BFL. For small orders of single units with this power.)
BFL, KNC, Avalon... (Were/are still preorder for new things)
X-Box One (Was Preorder)
Playstation 4 (Was Preorder)
Grand Theft Auto V (Was Preorder)
Assassin's Creed IV (Was Preorder)
Insert most new things here (Will start as preorder)
That was to the guy who implied "preorders were just AMT's way of doing things".