I use the APC mini, and it works great! Most of my issues have been resolved in this thread -> /viewtopic.php?f=76&t=3664
When it comes to your labeling, i'm not sure what you mean. I just match my buttons to the layout in the Live-window, and the button lights blink when active, as well as the button it self in the Live-window is shown active as well.
Thore lydlys.com - Freelance sound & light engeneer Using HW: D1024 & D512 Controller: 2x Akai APC mini my DIY light mixer