Complete the sentence!
If it ain't broke...
a) don't mess with it!
b) it means I haven't messed around with it enough.
Choose the response that best fits your personality and act accordingly.
Anyway, generally, if someone is having problems, we recommend that they try upgrading their FW. Otherwise, if the drive is working fine without any problems of any sort, we recommend that it's best that they don't mess around with upgrading it, as that can potentially cause problems at times.