I needed a rear rack bag that would not get in the way of my bike seat since it sets somewhat low. This one does a nice job and has plenty of room for just about anything you would need. The main compartment measures about 12x5x5 inside to give you an idea. A good find. Fits on my Sunlite rear rack perfectly. Some report that it does not stay in place,however it does have two straps on the bottom and one on each corner.
Have had no problem or issue. Initial concern resulted from a review stating that the SunLite would detach and fall off. This has not happened. True, that there is no "tie-down attachments" included with the SunLite. However, there are so many different bikes that one attachment will not fit all anyway. I simply used two 'black electrical tie straps' and in 90 seconds, I was on my way. The bags look great and are doing all that is advertised. Very pleased with this purchase!