I have a Hayward Cartridge System and it is brand new so I am w it for awhile.
Can you expound on why you like the sand filtering system better, what were any issues you had w the cartridge filter?
Regardless of what filtering system, consistent and timely maintenance is the key. I clean out all of my skimmers daily and the pump baskets all the time. the less debris in them, the less stress and more efficiency on the pumps and filtering system.