First, it increases chance for leaks, harder to open and close pool. If they are broken, very hard to fix. You can use the money to buy a pretty decent robotic cleaner, which is much easier to maintain, much better for cleaning.
I have these in floor cleaner, but almost useless, because I have the variable speed pool pump. Most time I have it run at low speed and the cleaners won’t pop up at all. I personally feel they are useless but no way to get rid of them.
@yangcha1 , setup and run correctly, IFCSs can be effective. In your case, returning water through the popups is simply costing you money. If you are not using your IFCS, then you should return 100% of your water through your wall returns (if possible). Head loss will be substantially less and your VSP will run more efficiently.
if that’s not possible, yours would be an example of an IFCS that was not designed properly, IMO.