I'll be honest, when I first got the dream matt I wasn't sure about it, but after a few runs I found it wasn't losing much, I think every system will loose some, but I only ever found one or two specks got lost.
The beauty about it is the reduced clean up time and the sheer ease of it.
His video showing the dream matt with lots of rocks doesn't show it actually running, so god knows what he did, mine doesn't work like that, he must have had a tiny flow.
That devin matt looks ok to me but his reviews are clearly biased and not fair. It would be good to see his tested properly against the dream matt, but at $370aussie dollars plus shipping from canada I can't see it catching on here.
Like I said earlier dream matt works great and it's not frighteningly expensive.