I purchased the prior model (the 7400) of the 7450 carry bag and I am basing my review on that bag.
It fits all of my gear (I wear 35"+1 Velo 3s and large Brown C/A and large Reebok Pant) with room for towels, jerseys, socks, and misc. parts in the bottom. The bag is tough, I am never worried about it handling all of my gear and being tossed around. It is surprisingly nice to carry over the shoulder as the padded handle helps with the shoulder.
The only thing I ever find myself saying that I wish it had were some internal pockets on the sidewalls. The bag does come with a knit drawstring bag that snaps into a corner via a plastic snap. But it always falls so I just leave it in the bottom of the bag.
Well worth the money, I know this bag will last a long time.