Yeah, for TUMI, one of their best sellers has 10 reviews on Amazon. Samsara had 5. Sounds like it's really taking off.
Think about it practically. I can get a battery pack that fits in my pocket for $20 that'll charge my phone a few times and my tablet twice. A battery pack in a suitcase is a stupid idea, a gimmick at best.
And it'll never hold up the PPS to the dilution that is already happening and is staged to continue.