Update, I've had it hooked up for ~48 hours now. In my system with a Finisar SFP I'm hard-pressed to say I can hear any difference as compared to my previous setup of a tp-link FMC with a Channel Islands 9v linear power supply. It doesn't seem to be worse, just nothing profoundly better. Still, it's working flawlessly and removes a box from my rack, so I'm not displeased.