I was at the Peak Design showcase store in SF on Saturday and had a good bit of time to play with their new travel tripod, and compare the carbon and aluminum versions too. (They're just at the beginning of shipping on the Kickstarter, said some folks might even receive theirs this week.)
Overall, I'm impressed with the design. For a lightweight travel tripod that also achieve full standard tripod height, it is very compact when folded and quite sturdy when the legs are fully extended and the center column raised just enough to give the integrated ball head full motion access.
I had my Hasselblad 500CM with A12 back, WL finder, and Distagon 50mm lens with me, which is also fitted semi-permanently with an Arca-Swiss type tripod adapter foot .. a 4lb, 4oz camera setup. Even with the (removable) guard pegs still in place, it clicked right into the PD quick release clamp and was utterly secure when the latch was locked. The tripod at full extension that way is just a little too tall for me to see down into the viewfinder without standing on my toes and peering over the edge of the shade. Should be just fine for most uses that I'll put it to.
The legs deploy and fold quickly and securely, everything is easily disassembled and reassembled for cleaning. All the knobs and such are easy to get to and comfortable in use. PD has made the commitment that they will carry every part as a spare in case of damage or loss. Then universal head adapter changes in and out quickly and easily so I can switch to that and use the Arca-Swiss Monoball P0 or P0 Hybrid on it easily too, when I need a little more elevation and/or the pan capability.
I would say that as a set of legs it is about as sturdy and useful as my compact Manfrotto 019 CF3pro 3-section legs while being more compact and a touch lighter. The integrated head makes the whole tripod much more compact, easier to pack and travel with. The aluminum legs are only a small amount heavier than the carbon; the carbon have the additional advantage of not getting as cold to the touch if you're out on a freezing day...
For the light to medium duty use I have in mind, I am now fully jazzed to receive mine and start putting it through its paces...
G