FWIW:

I never use "fill-in-the-blanks" response forms. (Same goes for eBay surveys and the like.)

TOO easy for users/customers to complete, so I imagine companies - like Apple - get tons of these . . . which are easily ignored at the other end.

BEST BET: Take the time and effort to send a letter/email (if the issue matters enough you). The chances are better that the recipient will pay closer attention to it. No guarantee, of course, but it does show that the Sender was more earnest, IMHO.