I will have my helper just hold the shop vac hose under me while i cut the wall , we can call it dust free for free!! What a scam more crap to carry around and im sure those tempplates will lose their shape after time.
I'll stick with my rotozip/cordless vac setup....sure it "costs" more per hole (60 cents vs.$22.90 )....but I can use each tool for other purposes...so maybe it actually "costs" less ($595 - Perfect Cutter vs. $130 - Rotozip/$100 and Cordless vac/$30).
I really like the idea behind this product. I find the accuracy of your holes to make a real difference, and cut-in boxes have just enough things poking out to make any simple rectanglular hole somewhat sloppy- resulting in a box that can wiggle in the hole. In short, as I see it, it is the templates that make the system.
Integral dust collection is also a plus; on some jobs, it's simply critical. I've had ninnies complain about "dust in the air" hours after cutting a single hole with a hand saw- even though I vacuumed immediately! Likewise, not every vacuum will survive an encounter with gypsum dust.
As for powered cutters, I have had mixed results. Some throw a LOT of dust into the air. The Dremel just doesn't seem to have enough power. All of them make it far to easy to either cut into a pipe in the wall, or straddle a stud with your hole.