Saw a CES video for it... on the right side where that USB-C port is, there is an "arm" that connects the two USB-C ports together, then you remove the screws from the bottom of the MBP and it comes with screws that go all the way through to the laptop to hold the base of the laptop between the laptop and this case :\
This product is *terrible*.
https://www.youtube.com/watch?v=vUe2KAwvZsA
I don't think the concept is bad, but it depends on the execution. Currently it adds 4 items:
1. Regular USB ports
2. SD reader
3. Ethernet port
4. Up to 4TB of storage
They said they've been developing this for 3 years. iirc they also said that the design is not finalized. If it were me, I'd add two or even three 2.5" bays in that puppy, as well as an extended battery (if not to power the laptop, then at least to power the accessories...Seagate's wireless hard drive's battery powers it for 6 hours), plus a Bluray writer, plus a scad of ports like their Thunderbolt dock has:
https://www.owcdigital.com/products/thunderbolt/thunderbolt-3-dock-overview
OWC does make quality stuff...I've purchased many of their products over the years, they make good equipment...I'm just very interested to see how this comes to market in terms of finalized features, and especially at what price point. I mean, you can add all of that stuff very easily & without much bulk, no problem. Samsung makes a tiny 2TB USB SSD for under $800:
https://www.amazon.com/dp/B01AVF6UHK/
You can buy a multi-port USB 3.1c adapter for under $100:
I'd imagine that the OWC DEC chassis will be a pretty pricey unit...plus you still need to buy storage for it...versus just carrying around a couple of compact adapters. I mean, they added an Ethernet port to the chassis, which means they're assuming you're going to be sitting down somewhere with access to an Ethernet-connected network or NAS device, so you'll probably have power, so you'd have to carry around your laptop charger too, so you'd need a bag, and the SSD & port adapter above are about the same size as the MBP power brick, so...yeah.
Neat idea tho!