I have an older T-Bag that I used on two long trips, a 3400 mile cross country and a 2700 mile Las Vegas. My daughter used in while touring western and eastern Europe. I hit some pretty bad weather during both trips and my gear did not get wet. Hopefully the first pic, taken along the Little Big Horn River, is clear enough for you to see it. It is mounted on my rack. The seat bag is an Aeorstitch and the other sack on top is my rain gear, not part of the T-Bab
The one on my buddy's Harley is also a T-Bag. On our return trip from Las Vegas we rode in a heavy rainstorm for over 100 miles. He had his covered and I did not (mine didn't come with one). Again, my gear was dry but everything on the bottom of his was wet. The bag wicked the water splashed up from the pavement and soaked his gear.
I mention this because water resistance is something to consider when buying a rack/seat bag. Look closely at the construction, especially the inner seams and check to see if the material on the inside of the bag has a water resistant coating. Also look at the underside of the bag to see how far up the waterproof bottom section comes.
To my knowledge, all of the T-Bags are top loading, meaning that you have to unpack the darn thing to get at your stuff. The new Kuriyakan bag that I saw at bikefest was front loading, a real nice feature. It also had one approx 8 inch wide velcro mounting strap, which I liked, while mine and most others have several. The Kuri side compartments were removable, a nice feature, while the T-Bags are fixed but expandable.
Hope this helps a bit.
