I too was shocked at how loud it was when I first hooked mine up.
But I made a little pad out of paper towels, put it on top of the injection spray thing, and it made a HUGE difference, wihtout interfering with the foam production. They should sell the thing with a pre-cut piece of filter pad or something.
Regarding the microbubbles, buy their preskimmer box. Does two things. One, causes water for skimmer to be skimmed from the top as opposed to 3 inches down where the pump is. Second, the water coming out of it dumps into the box and then overflows out of it, mitigating any microbubbles. Works like a champ! Only negative is that it consumes more in-tank space.
My Remora has been working great, pulling out good goo all the time.
Make sure you clean the jet every couple of months with that brush they give you, otherwise you'll see your foam production go down.