Good thing you won't need to order directly from the manufacturer so shipping won't be so expensive.
People don't care about 1-2 extra kg (we have flat rate shipping in 'merica), or having extra cables, or needing shelves to stack. (this is clearly for the home miner. Not for DC use.)
The average miner cares about $/gh and w/GH. And it looks like rockminer will deliver on both. (and before you claim ~13% extra efficiency justifies paying double the price, no it does not.)