This sling is my first Pioneer product and it's in the limited edition MultiCam Black colorway. It's true to its description on being a "little nugget." It's just a little over 1L, but takes a step forward from functioning only as a pocket reliever. I could fit my phone, car keys, chunky wallet, AirPods Pro 2, hand sanitizer, mints, lip balm, and a Nanobag in mine without noticing anything being bulky.
The bag has quality materials and stitching, but I wish Pioneer added removable straps to the non-black colorway options. Also, the zipper pulls do jingle quite a bit, but I managed it by parking them on top of the bag, rather than leaving them dangling on the sides.
At the moment, I use this sling to slot in different backpacks, unless it's a small outing. Makes it convenient to not busy my pockets or individually remove/add items from my bigger bags. It grows on me every time I use it. The sling's a great product and I'm pretty happy with my purchase.