No, they're not, but you need some high frequency treatments, too, and the corner is a good place to put them. My dealer (Rupesh) brought over some 8th Nerve stuff, and I was impressed at how well it worked for as small as it was. I think there a place for both huge (Real Traps) and small (8th Nerve). Putting a Mondo trap in corners isn't going to be a hit in the WAF department, for most wives (my girlfriend says that even if she became my wife she wouldn't mind the Real Traps -- as long as it's one room).