I've been trail/ultra running for 10 years and have had a handful of run vests (UD, Rab) during that time. This one is by far the best! Supremely comfortable, I've had it out on several long runs now up to 6 hours with no pressure points/chafe/discomfort (shirt on fwiw). The material is light, stretchy, and soft. I'm a fan of the white. Plenty of storage space both front and back, though I haven't yet even needed to use the side pockets. While the bottle pockets are designed for the longer/narrower bottles, I've been able to fit a mostly-full 0.6L Katadyn flask+filter in one without much hassle. The load distribution is very well engineered particularly with 2 full bottles up front and 2 more in the rear pass-through pocket. Very little bounce present in any full/empty bottle combination both front and back.
The attention to detail is superb across the board. The tension adjusters are clever. The chest "straps" are thick enough to work but stretchy enough to not restrict breathing, and the simple hook closures are very functional. The lower rear pass-through pocket openings on either side are slightly sewn shut on the lower portion of the openings to prevent items from sliding out sideways (just the right amount of room to put a bottle in though). Details like this really elevate the vest.
I have a 44" chest (male) and had to abandon my recently acquired Rab vest because it was too restrictive even in the largest size. I feel right in the middle of the size XL adjustment range on the Valhalla, no uncomfortable chest tension at all even with full bottles up front. Props to Terignota for making a vest that works for larger bodies! It would be cool to even see another size up as I bet there are other folks in that size range who would be psyched to use this vest.
The only real downside I've discovered so far, apart from some slight un-stitching happening at the top of the rear zipper (very minor), is the lack of a built in pole carry option. I haven't tried putting them in the pass-through pocket, but I suspect it would be a bit awkward given the feature I mentioned above. However, at $90 (including 2 locking flasks!!), the addition of a $30 pole quiver still puts the grand total under what many other vests on the market cost. So, not really a big deal.
I highly recommend this vest. Pro tip, adding a 3rd locking soft flask put me just over the free shipping threshold, so I basically got an extra bottle for the same cost as the stock option+shipping. Get in on that deal while it's still around!