how many people have had problems with the "compressed air"? plumbing tools, like "one second plumber", ...

"drain blaster", etc? Also what else is out there (in Canada)other than the one ones I mentioned?

I would not use these. Drain pipes are not designed to withstand pressure. Just using a regular bathroom plunger, I blew the bottom out of a metal p-trap. Better to use liquid plumber or a snake to clean out a stopped up drain.