I can't add much to what folks said above, but I can agree that the Contrail is a fantastic shelter for most conditions that I face. It does take a couple of tries to get the geometry of the pitch right for the first time, but it's hard to argue with a fully enclosed (and surprisingly roomy) shelter for 25 oz.
I agree that the middle pole (for the foot end) is important for rainy conditions, otherwise the water wants to pool up there. It also gives you a little extra foot room to avoid brushing your sleeping bag foot against possible condensation.
The longer apex line can be helpful (or necessary) in more windy/stormy conditions, to allow a really taut pitch. I'd suggest adding one, perhaps with a micro-carabiner so it can be easily removed for trips when you know you won't need it (most of my hikes are in mellow conditions).
Also, an easy trick to tighten the silnylon after it "relaxes" (e.g. overnight) is to angle the front pole (if using trekking pole to set it up). This makes it easier to get in and out. And when you see that the shelter is getting a little saggy, just decrease the angle of the pole (or adjust the trekking pole length slightly longer), and you have instant taut pitch again, without leaving your sleeping bag.
Give your Contrail a shot. It's a great shelter for most conditions.