Ortlieb

Really well constructed and light weight, like all of Ortlieb's gravel bags. But, having problems finding a bike to use it on where my knees don't bump into it. Didn't really work out on my gravel bike, that I intended to use it on. The top tube is too short, and the bag is too wide, my knees are always bumping into it, and it's just too annoying. Ended up putting it on my MTB (Santa Cruz 5010, 2019), which has a longer top tube, so very little knee contact. It is small in size, my Pixel XL barely fits into it. Should have bought something taller and skinnier, that would have worked out much better. My pedaling style is knees in towards the top tube at the top of the stroke, so not a good fit for this bag.

Great quality bag from Ortlieb. Waterproof and very roomy. Mounting system is simple and sturdy - has foam blocks that help the mounting and protect the head tube from scratching by the straps. Only missing feature is lack of a valve to deflate when packing, but not critical for this style bag.

It holds a lot of stuff without having to cram it in. Can carry tire levers, tubes, multi-tool, cash, ID and more and when needed doesnt have to be pried out. Clicks on and off when you need to put bike on a stand. It is waterproof. The attachment to the seat rails seems very sturdy unlike a previous model by Fizik which eventually broke. So far, a great seat bag.

Great frame pack for mid sized items. Waterproof, and dust-proof. The only problem is that the zipper is on the wrong side. If you lay your bike down and want access to the bag, the bike has to be laying on the drive side. The zipper should be placed opposite the drive side of the bike.