Ive found the 6L sling being a good compromise between the 3 and 10L version. It works well with a mirrorless camera plus one big and two small lenses, or tow big lenses.

I purchased the Everyday sling after MONTHS of looking around for a quality sling to replace an aging backpack. I read tons of reviews, sifted through options, and ultimately settled on the Peak Design Everyday Sling for the high-quality of the build, the simplistic-yet-functional design, and something like a gut feeing telling me this was the one. I was not disappointed. After receiving the product and using it for about a week, I went all-in on Peak Design with a few cases for our phones, phone mounts for our cars, a tripod for our phones/camera, a magnetic wireless charger, and a bike mount.
The Everyday Sling is gorgeous, durable, and versatile, easily able to keep up with my demanding daily needs and hold up in quality. I use it for everything from carrying tech to everyday satchel-like use to photography. It is an amazing product.
The ONLY thing I would improve was the design of the tablet pouch - it is just a tad small, and I find it tough sometimes to get my Pixel Tablet in and out (especially with the case).
Otherwise, this is a brilliant product with tons of features and a well-thought out design.

I already have a very good sling bag from Mindshift... I highly recommend it. However, I want a more traditional should bag so I chose a Peak Design 6L. Very well designed. Has a lot of details and useful function.

I have this in both the 7L and 10L sizes. Each has it's role, but I have found the 7L is the perfect combination of size and features to make this my go-to bag when traveling. Comfortably fits a long lens with hood, two shorter lenses, the camera body, and a handful of accessories. When traveling abroad, the sling lets you keep it up front when in public trans situations, but quickly flip to the side/back for normal movement. Quick lens changes are a snap due to the intuitive zipper location that almost turn the bag into a mini-bench when are forced to remain standing and are nowhere near a table. On top of that, I have found a lot of places require you to hang your bag on the front as you go through. Backpacks must be removed and turned to the front (reverse when you are finished. The sling bag is an easy slide to the front and back around when you are through. If you travel with your camera and can narrow your needs to 3 lenses you will fall in love with this bag. The 10L is very similar but is a little more cumbersome to be used this way, though it is the perfect carry on bag on European flights where they frequently check your carry on whether you like it or not.

I was hoping for a smaller bag than my 10 L sling to take with me on walks or jaunts into NYC for the day. I just needed to fit my Fuji X-T5 with 16-55mm lens attached and the 8-16mm lens. I can also fit in my lightning trigger, memory cards, a spare battery and three filters in a small filter wallet along with cleaning cloths. It’s utterly perfect, carries effortlessly and the main compartment opens wide so removing and replacing the camera and lenses is easy. The strap is comfortable and easily adjustable. I have to have my 16-55 lens hood reversed for it to fit but that’s an easy tradeoff for the nimbleness of carry this bag allows for. I’d maybe like the front pocket to be a little less flat but it gets the job done.

I recently acquired an a6700 and wasn’t sure how it would accommodate the camera and lens combo. I’m happy to share that the bag is good for what I need and I’m very pleased with the performance. That’s two lenses, body, cray card, insta 360, two extra z100 batteries, three memory cards and flat wallet. Excellent grouping !

I got the 3L sling bag and it seems to be the right size for an X100 size camera and some accessories and room for sunglasses, tissue papers, wires etc. The quality is definitely good, I only wish the logo material was made out of leather like the grey color version, just something to age a little and patina.

I’ve been using the v1 5L sling for the past 5 years. It’s become my favorite shooting bag for my Fuji MILC system. (Easier to “run and gun” than the Domke bag that proceeded it.) I got the 6L sling a couple of weeks ago. It’s everything the original was…plus just a little bit more. The more means the zippers move freely, not catching on the top of my gear. I can add a prime atop the shorter zoom. Or leave the 1.4x teleconverter attached to the long lens. More room to stash strobist gear too. The removable tripod straps are a nice upgrade too. I now longer need to lash my tripod and nano stand to the top handle.

I was initially concerned about carrying a bigger bag. In practice the additional bulk isn’t noticeable, but I do appreciate the added volume.

I bought the 3L Everyday Sling that would fit my needs; compact, configurable, looks water-resistant, fashionable

I use my everyday sling daily. I can carry my phone, wallet, and keys in the sling and it is comfortable to wear.