This topic came up about a month ago and a text from Darin O'bryan finally got me motivated to open this stuff up and give it a test drive... I am very impressed. It works nice.
I don't want to compare it to LustrePastes quite yet... but initial impressions were extremely positive and I'm going to work with this a lot more (probably exclusively) to form a better opinion. I did a 14 unit case with e.max MT with it today. I seat it tomorrow and will take some photographs. I also am going to test the fluorescence of it because the shading and essense pastes supposedly have particles in it. I really like the dentin shading. Really easy to apply.
Looks like we have another winner :) Darin can post his comments as well.