The TLC bags are shaped to fit the panniers. They are made from good tough woven material and have a range of internal pockets (one zipped). I have been very impressed with mine and they are about to go on another 'holiday' this weekend (1600km trip - 2 days).
Yes. I would concur with smoothlennie on his assessment. Interesting about the motobags though. I called them about a year ago-number was not in order. I have no regrets about paying much less for the tlc product and cannot see anything to fault their design or quality of construction.