I've used the Apidura Expedition Handlebar pack just once, on an overnight gravel ride on the Olympic peninsula, for about 80 miles. It worked as I had hoped - it didn't jostle or droop with use, and its capacity was more than I had imagined. I used to use a Blackburn front roll, that clipped on with a little mechanism and held separate dry bag. And I know a number of other front bags are designed with a separate carrying harness, so I had worried that having to remove the bag to access the contents would seem like a nuisance, but really the attachment straps were easy to use. I did strategically place stuff I didn't need until camp time (sleeping bag, puffy jacket), so I didn't need frequent access anyways.
I can't speak to the long term durability of the bag, thought it's not something I'm too worried about for my use. Apidura has a good reputation, and I'm personally not doing any super long (or frequent) expeditions.
I ride mainly in the multi-user community forest trail system. The undergrowth can be really tall and thick making it difficult to see far down the trail. I you are on the switchbacks or more technical stretch of trail it can a choice of reaching for your bell or keeping control of your bike. This bell rings freely and gives others a heads up before I even see them. I've gotten more smiles and people saying "I love your bell." The equestrians really like it and are much more friendly. I really like the option of turning the bell off when climbing or out on the road. It maybe could be a bit louder, but over all I strongly recommend this bell.
These fit well up to 25MM Continental on my Cervelo RS. I did have to file down the front fender arm attachment to clear the bottom of my shifter cables that do not run internal to the frame and while it is tight, clearance is there. Once the frame protector decals are on and you dial in fit, and adjustment of the fender arms, another big improvement, these are easy on, easy off and pretty great overall. I am happy with them, plenty low in the rear. A nice option in the rainy NW.
I would say that overall I'm happy with the purchase. I think the price is definitely a little high. Only other complaint is you have to wait to do multiple rings in a row. When you try to hit it twice it gets muffled because it's still vibrating from first ring. The tone is pretty unique and I think a friendlier way to signal than all the other bells I have used. The look of the bell is sweet and installation was a piece of cake. Overall, I'd recommend as long as you are ok spending a little more than the average bell.