I'm the kind of dog owner who is really particular about training tools... Everything has to be designed so it's practical and user-friendly, otherwise it'll quickly frustrate me and be replaced with something else. I have a 2-year-old border collie and we go everywhere together. I needed something that first and foremost dispensed treats quickly enough to ensure I wouldn't lose my dog's attention or miss a teachable moment (I've used both zipper pouches and cinched string pouches previously, and found both to be awkward and result in too slow of a reaction time). I wanted something that I could use one-handed, since having a free hand makes training that much easier. It also needed to be fast to put on and take off, not too heavy or bulky, and able to hold all of my essentials. After a year of using it, I've yet to find something better than this Ruffwear pouch!Pros:- Magnet clip means super-fast treat access, but is also strong enough to prevent a mess (I often put the pouch in my work bag after dropping off my dog at daycare, and with some basic common-sense stowage it's rare that any treat dust falls out)- Makes multi-tasking (aka dog training) way easy. It doesn't take long to figure out a fluid one-handed motion that quickly becomes muscle memory, as opposed to fussing with a zipper or some other overly complicated closure. With this design, I can also operate a clicker with the same hand that I use to get the treats, keeping my other hand totally free for leashwork etc. No more needing to leave my treat pouch open for easier access, which means no more accidental treat spillage! I also love that there's a crisp snapping sound when the magnet latches, which is great so that I know it's closed without needing to look.- I wear it via the included belt strap. Never had any issues with it and it's a great fit for me. I usually have it adjusted to the tightest setting which is about 28" (the longest setting would be roughly twice that length). Lots of other treat pouches I've tried were WAY too big on me even at the smallest size, so the fit is a huge plus. That being said, it would also be very easy to replace the strap if you need something outside of this range (see below for a tip on installing the belt strap).- Very lightweight and low profile (awesome for running etc.) but holds a surprising amount (the pic I posted shows about a cup of treats inside with a ton of room to spare)- It's a sturdy bag. The only sign of wear that developed over the past year of heavy daily use was that the Ruffwear letters started peeling off eventually, which is just a silly cosmetic thing. None of the loops or seams have showed the slightest sign of loosening, even though this thing has taken lots of abuse. This is consistent with all of the other Ruffwear products I've owned.Cons-but-not-really:- Like another reviewer said, wearing it via the plastic clip is not very comfortable, but for me that doesn't matter anyway since my preference is to wear it using the belt strap (and besides, I would rather not accidentally tear a pocket or belt loop on my clothing by wearing it the other way)- Out-of-the-box, the bag tends to hang kind of loose on the belt strap, and flops around a lot. That's easily fixed by installing the belt to run through both fabric loops AND the plastic clip (see photo). After you do this it'll be much less likely to flop around and more streamlined to your body. Overall I like this belt strap & attachment design way more than the other pouches I've used. The more common design for these pouches is when the strap has long plastic clips on either end that can rotate and attach to the pouch via D rings (similar to purse straps), but I much prefer this style of belt which has only a single flat buckle (I find the rotating clips annoying and uncomfortable). The big fabric loops still make it very easy to remove the belt completely if you want to replace it with something else, or wear the pouch using only the plastic clip.- There is not a ton of extra storage, but that's the necessary trade-off for having a lightweight, non-bulky pouch. I overcame this inconvenience with a few simple upgrades: First, I attached a small spiral ring to the fabric loop at the top of the small pocket, and then a large metal clasp to that ring. I use the clasp to attach my keys, or a clicker, etc. and it can be tucked completely into the small pocket, even with something attached to it (and if you use normal-sized poop bag rolls, they should also fit in there at the same time). The clasp gives me peace of mind that I won't lose my keys when pulling out a bag, and if the pocket gets a bit cramped (like when using an XL poop bag roll) I can also hang my extra stuff on the outside. I could also buy a smaller clasp if I wanted even more pocket space. I also have a small carabiner attached to one of the belt loops that can hold even more stuff if need be (in the pics I have a clicker attached). I mainly use that carabiner to hang the pouch on a hook by the door (keeps it out of reach better than if I were to hang it by the belt).My next planned upgrade is to attach a holder for full poop bags (something like this: https://www.amazon.com/Okydoky-Holder-Leash-Carrier-Bicycle/dp/B0797YJR3Q/).My ONLY real annoyance with this bag is that it doesn't have a pocket for a phone (which would be super useful on days when my clothes don't have any pockets), but everything else about this bag blows competing products out of the water, and if I'm specifically looking for a small streamlined bag I can't exactly complain that it doesn't have extra large pockets. Anyway, they make add-on pouches that can hold phones (such as this one: https://www.amazon.com/Amphipod-Unisex-Rapid-Access-Pouch/dp/B0055Q43XO/) that I might add in the future.Maybe I'm over thinking all of this. Maybe I've said too much. Maybe it's just a pouch. All I know is that this thing has been extremely useful since I got it a year ago, and has by far the best design of any treat pouch I've used so far. I have a lot of Ruffwear products and they're all top quality. You get what you pay for with this brand, and this product is no different!