My problem is their maintenance cost of 8 cents per MH. Right now at CleverMining 1MH/s would give you 0.00033 BTC which is now 15.2 cents. Therefore you would be paying about 53% of your earnings in maintenance, I think that is high.
For me, it's just a little bit higher than what I would be paying for power. I'd rather have the hashlet, than have to deal with the heat, noise, etc of a physical unit. They're probably using current generation miners for the Hashlets, which aren't the most efficient either.