That looks good to me. I use a little pump to get water flow in the tank and to run a CO2 mist, but the problem I run into is blockage of the inlet grill by debris, snails and leaves, plus it keeps pulling off the glass where the suction cups are trying to hold it. It ends up spraying the outlet straight down to the substrate.
I like my little Fluval filter, but keeping the inlet tube free of debris and snails so it isn't being blocked has been a problem. This seems to solve all of those problems at one time, plus clearing more space under my tank, and avoiding a failure that would syphon all of the water out.
What filter sponge do you use, and is it at all LFS places? Do you keep washing it and reusing it or is it a disposable thing?