Getting back to Friz' original question:
Yes, I have the Peltor Tactical 7's (purchased from Dillon a couple of years ago). I like them a lot. My main complaint is that the battery compartment is a bit hard to access in mine, but I believe that's been improved in more recent models - make sure that you get a set with an external battery compartment door.
In use, the muffs work great. I particularly like them when I'm instructing or taking a class - it's nice to be able to hear my student or instructor without the need for shouting. When taking a class I'll often wear them backwards, with the microphones facing the rear - towards the instructor.
Another advantage of the electronic muffs is at indoor ranges. Most indoor ranges are particularly noisy. I'll often wear foam plugs underneath the muffs, then crank up the volume on the muffs to compensate. I can still hear normal conversation through the plugs, but the sharp crack of muzzle blast is filtered out.
Another couple of advantages of muffs. First, it's been demonstrated that plugs don't function quite as well as tight-fitting muffs, since sound will still penetrate the bone structure around the ear itself. Muffs cover that area. Second, they keep your ears warm! Third, if you keep them by your bedside, and hear a "bump in the night" you can put them on to amplify sounds in the house, as well as protect your ears if you actually did need to shoot.