I have the great big can too and it has turned me into a believer. For starters, without it I do not honestly believe I would has shot my buck this year. (see the "It isn't a Monster but...." thread on this forum) The week before I had an 8 pointer sneak up on me while I was using the can. It literally got right under my treestand before I heard a branch snap and it picked me off. On both occasions I had been using the can sporadically...every 20 to 30 minutes or so. With the former I let out to calls after I spotted the deer and he came right in.

As for that Ultimate Scrape Dripper....I am not too fond of it. I never had much success with it. Maybe one of those battery powered models might be more trustworthy....though probably illegal in many states.