*edit* If you aren't having issues with your current firmware, it is probably advisable to avoid upgrading. I wasn't having any issues, but I can't help but tinker with things. Also, if you do choose to upgrade, BACK UP YOUR DATA. Chances are nothing bad will happen, but it's better to be safe. Looks like Crucial updated the firmware for the M4 series of drives from 000F to 010G recently. I went through the upgrade process and it was very quick and painless. I don't see any major differences, but the release notes were enough to convince me to try the update. As per the crucial website: I ran the BlackMagic disk benchmark and I didn't see a noticeable difference in speed(it was faster by about 1%, I'm sure it's within the margin of error of the test), but the promise of better power consumption sounds good to me.