Not sure if we are talking about the remora or the EC from Aqua-C, but heres my opinion.
I had a Remora and it barely did anything other than move some water around. Would fill the cup every two weeks or so. I tried upgrading the pump to a Rio 2100 (692 gph vs. 295 for the MJ). It was a bit better, but still not skimming well.
I then scrapped it and hooked up a PM Bullet 2. Man that thing rocks. Fills my ext. waste collector every day or two. I have a 10" puffer, a blue hippo and two damsals. It pulls out dark coffee/tea colored skimmate.
Before getting the beckett, I was starting to grow a HA farm, and in the few months since, with little else changed, the HA has begun to recede ALOT.
In short, I am scared off of Aqua-C and would recommend a beckett to anyone. Becketts are not plug and play, but once dialed in they are awesome.