I've got 6 dvd/bd burners in my stacker case I love that thing. Somehow I could see how figuring out which letter was which might be a issue, provided you have more then a few
I usually go into disk manager after I have them where I want them and all that and rearrange the drive letters to suit me, my favorites first. I guess I don't need all of them but for a while I was regularly burning different disks and jobs with 4 of them depending on which was best for the task at hand.