I have one. Really like it. Good sized 3 litre bladder. Easy to get the bladder out. Put it through the washing machine lots of times and still looking good. 2 pockets. Never going to fit enough for a long trip in but I can easily fit all spares needed for a 3 hour ride, tube, tyre levers, pump, patches, 2x multi tool, phone, food etc and still have a bit of space left. Because its quite a narrow bag it sits in the middle of your back nicely so doesn’t get in the way. Only thing I would change would be to have a thicker waist belt/strap but that’s only minor.