The Contrail is a great shelter, and if it fits your style, then you wont go wrong with it. I own and prefer the Notch for the following reasons:
Storage – Yes, the floor area inside the netting is small(er), but there is a great deal of protected storage in the dual vestibules. Throw a piece of polycro under one (or both) and your gear is as good as being inside. Dual vestibules mean you can store your gear in one, and use the other for boots/water bottles and ingress/egress. Never underestimate the value of not having to crawl over your gear to get in or out.
Entry/Exit – I addition to the point above, I find a side entrance much easier to navigate. I'm 6'2" 220lbs and not particularly flexible. The Notch style of entry (like the MSR Hubba) is simply the most natural, easy entry/exit I have found…no crouching, stooping, squating or gymnastics. The Notch's side entry also protects the net inner from rain so if the storm is light to medium you can actually leave one of the downwind vestibule doors open or at least partially unzipped.
Double-wall – as mentioned in the post above, no rubbing against the (inevitable) condensation on the underside of the fly.
Room – I prefer the peak height to be in the middle of the tent. When I sit up, that is where my head is. In the Contrail, or similar designs, you must scoot toward the door as you sit up to keep your head in the peak. I do not touch the netting of the Notch with either head or feet when lying down, and have plenty of room on each side to store things I want to keep close.
Weight – I switched from the Hubba (which I dearly love), to a tarp/bivy, and then to the Notch. By the time I had all guys, stakes, groundsheets, etc to make the tarp "weatherproof" enough for SE US thunderstorms, the package was only 3.5 oz less that the total Notch package…and less comfortable IMO. So in the end, I cut my shelter weight in half with the Notch.
Wind – While I have not had the Notch out in wind above 20mph, it seems to be such an efficient shape that, properly staked, I would not fear anything under 40-45 mph. Get at least 4 long stakes, I use 4 Ruta Locura 9" carbon for the main four points and 4-6 TI shepherds hook stake for auxiliaries.
I value comfort and security. A light pack equals comfort, but comfort in camp is also important to me. These are two competing and often contradictory goals. My summer base weight is ~13lbs, while my winter base weight is ~17lbs. I have recently developed the following "lightweight" backpacking realization:
"I am unwilling to reduce my current comfort level simply to shed weight, thus my goal is to increase comfort WITHOUT increasing weight."
All of my gear decisions are guided by that philosophy. Good luck in your search for an awesome UL kit.