I don't have the curve but I do have a bubble magus and that is the best skimmer I've ever owned. I use to be a reef octopus guy for years. Bubble magus was definitely an upgrade
I ran a curve 5 for a few years on my 75 and it did great. Every once in a while it would overflow but usually only after i messed with something or just forgot to drain it. It would fill the cup about once a week and was quiet enough for me (couldn't hear it over my noisy system). When I upgraded to a 120 I decided to take a chance with a Coral Box D700 and it has been a little more touchy but overall it works very well too.