The Epochs, in a word, are EXCELLENT! They're FAST and they're 100% Proportional! Which means you can just pop the crystal out of the cheapy/cruddy stock Tx that comes with it and use it in a much better 2channel AM Tx!...I use the controller from my Mini-Z and it works perfectly.
Check out our Sister/Brother/whatever site for the lowdown (and the Shop sells Epochs too).
http://epoch1-43.com/