Seems like you have done this in reverse. Usually people ask for an opinion before they make the decision, you have done the opposite. You'll never get a straight answer to that question anyways. Everyone has an opinion and likes best whatever it is that they have on their pool. Many PF members do have cartridge filters and like them just fine!

Having a pool store tell us that the numbers are perfect doesn't mean much to us. We really need to see the actual numbers -- taken with a drops-based kit. The best thing you can do for your pool, is buy a good test kit and test the water yourself. The kit we recommend is the Taylor K-2006 or 2006C which you can get through the test kit link in my signature below.

Welcome to the Pool Forum! Hope you enjoy participating with us!