I am looking at it as a cost of convenience, it is more expensive than socks, but if works as expected I will be able to go weeks without worrying about changing clogged socks, sitting and turning dirty socks inside out and washing socks. Thats another thing you can say about this hobby, its a money pit and if your worried about money, keep tropicals!! I've tried cups, mesh socks, fleece socks etc.. I find all a pain. All that being said, i just got my Klir today, I'm very impressed by build quality and fit/finish, looks real nice and was easy to assemble. I have a Ice Cap 36 sump and it fits perfectly in the one sock container and only protrudes about 4-5 inches so very compact. If this one works i'm definitely going to get a slave unit which will fit nicely in the other sock compartment. I'll post again with an update once i have it running.