A great idea. I'm learning guitar and bought these as something to keep practice interesting. Yes, you can find loads of blues licks online etc, but these are so small and handy. Now I just open the pack, find a card and run through the lick without having to faff about with computers/internet.
Really easy and simple way to help develop skills. Also nice and portable so useful when travelling and wanting to keep my hand in
- (Cheshire, United Kingdom)