I LOVE travelling with the Sci Con Aerocomfort bag. It is incredibly easy to pack and so far I have travelled as far as Maui with my road bike and off to Fernie with my mountain bike and the bag has performed most excellent.
In choosing between this bag and the hard case, I have chosen the hard case for my time trial bike for racing only because of the disc wheel. I am on the fence as to whether that would travel well in this bag or not and whether I should figure out a way to extra super reinforce it? I will let you know after I talk about it with the uber-knowledgable Mark Andrews.
In order to pack my mountain bike, I used through axle adaptors for my bike rack inside the bag to hold the front fork. I ended up not worrying about the rear axle and instead just tied the rear of the bike down to the frame. SciCon has said they are going to offer adaptors for this frame inside the bag to accommodate mountain bikes. For road machines, however, this bag is unparalleled in design and ease of use.
Check this bag out. Awesome. www.sciconbags.com