I have both an odor sok and a can filter. I bought the odor sok first, before i was getting serious. I have my room vented out a basement window by my front door. And once flower power time came there was most definitely odor coming out of the room. It was a little different though, had a high sweet smell of marijuana, not the deep skunky one. It did eliminate ALOT, just not enough. I bought the can filter 33 and it did a MUCH better job. I now use the odor sok just for my veg chamber, it handles that well. But for flowering, go with a can filter. JMO