I have only been using the RW-15 for a month or two but so far have been very happy. I have been successfully using 2x WP-40s for a couple of years on my 125g and have been happy. I the RW15 so I could have three pumps and rotate one out to clean. I think the RW15 is a bit more powerful than the WP40s and sends out a wider flow despite being slightly smaller. I think I like the newer RW series better assuming it holds up at least as good as the WPs. I can't comment on the controller as it is hooked up to my ReefAngel controller allowing an unlimited number of flow options.