Initially there was a bit of confusion in how to keep suction — and before the latest how-to video I experimented enough to come to the same conclusion/process as the video.
After that phase, it really has been a breeze to wear and keep on. I personally am enjoying the device and figured that any growing pains would be hashed out with the help of everyone here per usual — and I was right.
I keep a personal journal of time spent and measurements, so from here it's just a waiting game and patient process that I'll update on after consistent use.
I urge everyone that does buy the SD to really give it a chance, follow the videos, ask for help if needed, and experiment until it works for you. It's a wonderfully made device with excellent build quality, and can be a staple part of your routine.