This is my favorite set so far. I would love to hear more guitar sets with different guitars (funk for example). If I were to change anything, I would a note or half note to some sounds, especially "sign in" and "sign out" sound similar. When I'm half asleep I have to think about which sound I just heard :) If you could make them more distinctive, maybe by having them go up or down in scale, that would help a lot. Also, I don't think the sounds are too long at all; they sound great.