I use both and haven't had any problems....although I had to move my rack on the oven down after I burnt some caps, lol!!
I'm not a fan of the xyron. I have issues with it getting enough stickness on the image and then sometimes it ends up all over the image
I haven't tried the mod podge yet with the colores, I used it with the ET before I got the xyron with good results....looks like I am gonna have to test it
I'll let you know....it will prob. be tommorow before I get a chance...