This Mini Compressor surprised us. I was afraid that after a few years of bouncing around inside a saddle bag or pack this might not work when needed. I was wrong. (After once experiencing a flat in a fairly remote place I found both long-carried innertube-filling pumps -- an old Enginair hose kit and a 'backup' bicycle tire pump -- had failed. Those simple tools had both been damaged by me not packing them away carefully enough.) In contrast the little Mini Compressor has been working for our customers when its been most needed. Who knew that it would turn out to be so reliable?