Yeah I thought I didn't need one to, until I had a bad flash with my KT7 Raid.
I flashed about 200 times and it was a first.
I now have one on my system $19.95 and worth every penny.
Easy to install just revove bios chip, plug in the bios savior and the switch plug, then insert original bios.
I now can experiment with peace of mind.
If it goes bad just flick the switch and ready to go.
I won't run without one now. Good investment