I believe it will be perfect. My new carbon road bike has no way to mount a rear rack and I bike like a pilgrim in southern Iowa. No services for miles ie while route. This bag can carry whatever I need or leave empty to store a jacket as the weather heats up. I was able to stow a knee length puffer coat with room to spare. I can’t get out to tide til the weather warms up but I’m very impressed with my purchases.

I've been using this bag for 4 months now. I really liked the look and feel of it when I bought it. It's a good size for snacks, tools and a jacket. The fabric is durable and it's well made. After a torrential downpour while out riding I realised it is not waterproof. It took ages to dry out because of the thick fabric and lining. The slide buckles seemed like a neat idea. They have withstood me taking the bag on and off every ride but I continue to be concerned that they'll break when I'm tightening the straps. Stronger, thicker plastic would give more confidence. I don't see the purpose of the spongey pads on the straps as they just float rather than stay pressed against anything. Perhaps if I wasn't trying to mount the bag on a bar that also has brake and gear cables to navigate it would be possible to press the pads against the bar. On long rides I have to stop and tighten the straps several times as they work loose and the bag droops towards the front tire. This is the most frustrating aspect of the bag. There are better designed bar bags available. I wouldn't recommend this one.

Haven't used the bag yet, but was immediately frustrated trying to get the bag on the handlebars. The plastic buckles that fasten the bag to the bars have two very little arrows imprinted on them indicating to push inwards. I did this, and tried to pull the buckle apart with no luck for several minutes.
I looked at a video online and all I found was "how easy" it was to attach to the handlebars.
After some trial and error, I discovered that you don't pull the buckles apart, but rather slide them apart. I don't believe this was explained anywhere in the directions.
Anyway, now that I figured that out, I will see how it works in the field. I am an experienced backpacker and have worked with many different types of buckles over the years, and this one was a bit too much work to figure out with no diagrams or explanation.

I haven't actually used it yet but it is well made and looks perfect for an upcoming cycling trip!

Just biked for one week in Ireland. Worked well. Thanks!