In addition to the weight/strength/waterproofness advantages, CF is in my experience user friendly, nice to the touch and body contact (e.g. I have no problem using a spare CF footprint as a blanket or perimeter wind break inside my tarp). Visually, it is a treat, as it gets away from the machine ethos.
The only drawbacks are the transparency, with consequent loss of privacy; and the increased solar gain, so in hot regions, white cuben becomes like a glasshouse in the direct sun.
I'm now using a new Locus Khufu in black cuben, taking advantage of the recent drop in value of the yen, and the proximity (I'm in Korea). The tarp shipped right on time, and I found them most cooperative. There is almost a reflective effect to the fabric, like a sheen, which I did not expect (and which is not present on the white/grey cuben), and which is not so great for stealth purposes, but which I am hoping will improve its solar performance, i.e. reflect sunlight more, with less gain - yet to determine.
Other than that it appears refreshingly handmade, almost like a tweed jacket.
I find the Khufu design excellent. As well as the great workmanship, it fits the body very well, providing space just where it is needed, and the catenary cut ribs mean it pitches rapidly and well - it is dead easy to get a great pitch in no time, which is a real advantage when you are tired. But I note the waiting time for Locus Gear tarps has jumped to 12 weeks.
You might want to check out image _DSC2504 at
which will give you a good idea of the black cuben Khufu (but which doesn't show the sheen - it is difficult to photo).