I ordered the Atom+ Custom 50L in anticipation of a winter Death Valley trek that had to be scuttled due to lingering storm damage. This review is based on a series of long day hikes, all packed between 22 and 30lbs.

In that context, this is the best-made and most comfortable pack I've owned. The combination of frame, perfectly-shaped and spaced and padded shoulder straps, and minimal but effective hip belt distribute weight amazingly well.

Based on previous reviews (e.g., 2/28/23) I went with the bullet net front pocket for extra capacity. It has survived a bit of bushwhacking, although I probably won't be plowing through late-summer manzanita with it. I also got the Y strap closure in case I ever need to top-carry a bear canister. And lovely colors, because why not?

A few minor quibbles to address:

-- "You'll miss load lifters": I really don't. See above re: load transfer. Or go with the Mo.

-- "You'll miss air on your back": It is a sweaty carry, without a doubt. But those arched-back airflow designs allow my terrible posture free rein to slump or arch, after ten miles of which my middle-aged back simply quits. At least for me, sweat and a back pad with better ergonomics are far preferable to dryness and sciatica.

-- One observation of my own: The sternum strap--needed for load distribution at heavier weights--fits my chest, but only just. It might be good to include a chest measurement in the order process, in case there are others even more box-shaped than I am.

I spent a 14-days-hike in the Slowenien Alps with the complete tent-overnight-equipment and am very satisfied with the Atom+ (50 l).
BUT the holes for the two inside poles at the bottom are much too short, so the poles flipped off almost every day.

And the "flexible" front-pocket is far away of the flexibility I hoped to get.
(See also this customer review: "solid construction with one annoying front pocket / cb on Feb 28, 2023)

After chatting with @tom.atko on the Huemul Circut, I seriously considered having an Atom+ Custom-shaped hole in my life. And I'm glad I did. Regarding features, sizing and construction, it's like my two favourite packs (Arc'teryx Arrakis and Gossamer Gear Gorilla) got drunk one night, got pregnant and had an amazing baby. It'd be rad if AP took inspiration from GGs sit-pad-cum-back-panel genius, but that's about it. Great pack, am super stoked.

i cant say enough about the construction and quality of this pack. the customer service was beyond what id ever expect. how ever after getting it out on a few longer hikes the front pocket drives me up a wall. i ordered the stretchy front pocket and it is beyond tight. every time i try to stuff my gear in that pocket it gets snagged or my snacks get crushed. it barely holds my usual gear for that pocket( stakes, poo bag, small ditty bag, and snacks). judging how well thought out and constructed the rest of the bag is, i sometimes wonder if it was a little mishap in the sewing process. i would recommend either ordering the bullet net or specifically asking for a looser fit on that pocket. other than this one annoying aspect, i love this pack

By the time I ended up with the Atom+, I got my gear dialed in, and got experienced enough to know most of my needs regarding dimensions, features.
Taking it out of the box was love at first sight, but when I packed it for the first trip, and put it on my back, I knew this was THE One.
Had an Osprey Atmos AG 65, GG Mariposa, and a Naturehike 30l. I always felt them lacking in some ways, or that they could be improved in some ways. Don't have that feeling with the Atom+. During my first trip with it, I was constantly amazed by the small details, which showed the creators really perfected the bag based on their own experiences and testing.
The dimensions are 100% perfect for UL gear. EPX200 material is great (very close to XPAC, but feels and looks a bit nicer).
The measurements for torso and belt were perfect (just follow the instructions on the sizing guide video).
Was never a hipbelt fan, but this one's is great, you can barely feel it, and it stabilizes the pack. (Now I feel a bit sorry for not ordering the hipbelt pockets.)
Gave a call before ordering, Tom himself picked up the phone on my first try, and gave me all the answers to my remaining questions.
Even if I really had to say one bad thing with a nitpicking approach, nothing comes to my mind, this bag is simply perfect. Totally worth the price, no regrets.
Such a top notch company! People of Atom Packs, thank you for making my pack, and I wish you the brightest future! :)