This Kathmandu Saddle Bag (Deluxe) was on sale for $20 so I grabbed it and finally replaced the frame bag I had since Day 1 of my cycling.
Build quality is very good, lots of pockets, and it's pretty light as well. Due to preferred position of my saddle seat, the bag protrudes at the back. I could have chosen the smaller saddle bag but it would mean limited contents.
At the moment, I have these items inside this bigger/deluxe bag: spare tube, multi-tool, puncture repair kit, a couple of chain quick links, spare light, energy gel, electrolyte tablet tube, and a 10,000 mAh external battery charger power bank.