I recently purchased this little gizmo. I have trouble keeping my chain clean, and I thought this would help. I used to have a full-sized chain scrubber from Park Tools, which I loved, but it is a bit big and heavy to carry while touring. This one is quite small. I also had to purchase a small tube of degreaser to mix with water to clean the chain. It’s a bit fiddly to use and the brush really doesn’t get inbetween the links, but with some effort, it does the job.