eD sucks. I had a couple of their drivers and, well... (6 month story)
However, I have had eDead v1 in my car for around 4 years now. In fact I just applied the last of it about a week or so ago. No problems. My application method was washing down the area with mineral spirits, and then applying the deadener with a heat gun and just some pressure from my hands.
I really would not use any type of mat deadener without using a heat gun. Rollers are overrated and wont conform to curves and uneven surfaces. At least not as well as a heat gun with a very little bit of elbow grease.