Yep we use them for all our electronics. Makes the rush before a bad storm a little easier to pull one plug for multiple items than to pull many. I also use it as an on/off in addition to the switches on various machines when I'm out of the room (plus I unplug the iron).
Years back we did lose a bunch of electronics to a lightning strike, though this was before I started quilting so fortunately no machines lost.
Cheers, K