I have had my Sears shop vac for many years (maybe 10 or so). It is great. Almost immediately after buying it, I purchased a Gortex Clean Stream filter to fit. I have never regretted it. This filter filters much better than the original paper plus it seems to last forever - well at least 10 years.
The problem with it is cleaning it. It seems that after a month or so, I actually have to clean the thing. Here is what I do: I wheel the vac out to the driveway, then pull up the motor housing (with filter) and start pounding on it with my dust brush - the fine powder drops into the cannister. I continue rotating/tapping - then brushing between the pleats until I am satisfied. It usually works out fine.
I'm wondering if anyone has found a better/easier method to clean these great filters.