No I don't carry a laptop. But parttner does.

But I've used panniers heavily for past 17 yrs. Since we are car-less, this does mean carrying alot of different things inside. My panniers aren't completely waterproof but that problem can be easily solved to carry things inside plastic blag.

Make sure the hooking system does truly fit on your back rack. Some systems are more difficult to wrench off the bike. Helps to have an inner pocket within the the pannier itself, so the pocket is abit hidden.

Do try on the pannier on your bike rack before you buy it. Prefer to buy just a bit bigger, not much smaller. You will thank yourself later, if you choose to do some multi-day bike touring.

Good to have reflective striping on bag if available.

If you use your pannier often enough several times a wk. for functional riding (work commuting, visiting friends or shopping), consider throwing in at least 1-2 bungie cords --for unexpected big pkgs. that must sit on top of bike rack.

If