Jury still out for me on the Motiv. But your experience is similar to the tons of others who post videos and swear by it. Now, the one i have may be very old, but it hold pressure. When I pump it up, I can hear it bubbling through the fluid. Last time I did my brother-in-law's car and we shone a light in the reservoir after removing the bleeder, it was full of micro bubbles. And his brakes went to crap. But I'll keep trying to find a way through with the pressure bleeding technique. I'm going to the shop tomorrow to try a pressure and vacuum bleed at the same time. I'll post results. I too find it hard to believe that many use the bleeder without issues.
For BTW: This is what I do - open the bleed screw, not letting the crud back up.
For BTW2: I use a dead blow hammer. Easier on the ears, same result.
For BTW3: I wish I was in this camp now. I'm not, but I most definitely will be
Cheers.