7A doesn't sound right for a full rack. Each rack has its own breaker and those are 15A at the smallest. I suspect the 7A was for a half-rack deal, though those are extremely rare for HE.
I'd also like to hear about this. But it's worth pointing out, that's just the rack space, bandwidth is priced separately. But, HE seems to me to offer very competitive and high quality bandwidth.
Also, I think most situations don't need to go from 0-servers to 44U of servers.
(Although VC backed bet-the-farm situations may like that route)