I have this sump, but I don't know if I am the best person to ask since I won't be using it as it was designed. I have the 4 port filter sock chamber, a baffle tub and two reservoir tubs.
I will say the modules are very durable and there is a lot of flexibility in the way you can drill and connect them. I have them setup in a row at countertop height in my basement which is nice to work on them, the glass top lids they come with cut down on evaporation.
I am not so hot about the flow mine could handle "out of the box". The most I seem to be able to get through a series of them with the 1.5" bulkheads mine came with is 600gph. As it was designed, mine is supposed to have flow for 1200gph split between a reservoir for the skimmer and then everything else, but I would rather not split the flow, I'd like it all go through each chamber in sequence.
So in the next couple weeks I have some 3" bulkheads coming that I intend to replace the 1.5" bulkheads with, and that should give me plenty of flow to handle my target of around 1200gph. I will probably add some pics and details in my build thread when I get around to that.