i'm on my 2nd g15 already. I wore the paint off the wasd keys on my first one, the 2nd is holding up nice. The 510 looks like a respectable back up option though after the disappointment of the g19. I did purchase a g13 for the purpose of controlling slaves on a separate device but realized I don't have the desk space for it atm, or really the need. I currently use the g15 button addon to display everything in place, freeing up bartender bars for other uses.