Works well and just enough space for all the spares needed for XC racing.
Worked well on my first ride. Comfortable and easy to drink from while riding.
Great for 2-4 hour rides, where you are more interested in hydration than luggage capacity. It will carry a jacket, inner tube and some tools, but not too much else.
Great pack like it a lot, didn't want a big bulky one but big enough for a few spares, spot on for a ride round a trail centre.
I chose the yellow, it is basically Hi-Viz. The latest bladder fill neck has 1/4 turn to lock and arms to assist drying - nice improvements over the bladder in my older MULE. Threading the bite valve through the shoulder strap is a bit more fiddly than the routing on the MULE, though.
I am carrying two 23c inner tubes, wallet, multi-tool and puncture repair kit in the lower pocket (my tyre levers are currently stored behind this pocket - there is some mesh and a couple of adjustable straps). Phone and keys go in the upper, both pockets have room to spare.
Overall it has done everything that I expected.
Great little bag with more space than you think from looking at it. Really comfy and you barely notice it in your back.
Great for cross country riding - just the right size to fit a couple of spare tubes, tool, mini pump and keys