I'm a gigging musician who frequently travels by public transport and bicycle. I typically travel without an amp, and I wanted one heavy duty bag with enough storage for all my gear. This does the job very well. It's comfortable enough for a long hike, and it's not too bulky to bike with. It easily fits all my tools, cables, strings, music, iPad, and even a guitar stand. I particularly appreciate the handles on the front and the back and the hook for hanging it in a closet. The trade off, of course, is that it's over 4 kg empty.