I'll chime in as well.
I replaced a Reeflo Super Dart with RD3 150W (as part of a full Dreambox sump overhaul).
Independent of Scott's setup, I am doing a lot of the same things. I do not control the RD3 return pump with my Apex (other than the power being on an EB8). I have it set and do not change it.
It is whisper quiet; I have my whole Dreambox sitting on a dunnage rack to the side of my main tank and the loudest thing is the trickle of water down the emergency drain of my Herbie overflow.
I have not had it long enough to make an longevity statements (and to be fair, the Reeflo worked perfectly for years), but both noise and heat are products of inefficiency which in and of itself are sources of wear on any mechanical system. To that end, I expect the RD3 to last a long, long time given how quiet and cooler it runs.