They seem to claim 1.5 charges for an iPad and 2 for a MacBook, even though the iPad has a smaller battery and only requires the presumably more efficient USB output. Their Tech Specs table is also full of errors (1V USB? Identical batteries for both models?). Later in the post they confuse mAh with watts (FAQS section).
The idea is plausible, but the claims are grossly exaggerated. Desktop fan 10 hours? Yeah, right. A USB one, maybe. More like one hour for a typical small 120V fan like they show on the video. MacBook Pro 2 charges? More like one, half if you're actually using the thing at the same time - and that's for the 13" MBP and the large ChargeAll, assuming 100% efficiency (ha!).
Then again, this thing is *huge* for the battery capacity - which at least makes the idea plausible (need space for the inverter). I have a 10000mAh USB power bank that is 1/3 the volume of the 12000mAh ChargeAll.
It'll probably work, but the specs are unimpressive, the claims inflated, and backers will be disappointed with the reality.