I have recently used it to cover an Akromaster. I really liked the gray and the red. However, don't let the heat get too high, it will turn brittle. Also, I had trouble with my heat dryer gun on high. Just some real careful swipes.
Is that typical of all coverings? I haven't used ultracote yet but have some for a Vector, which I don't have time to build.
I did have problems with the transparent purple. It didn't have much "sticky". I used some by sandwiching it between layers of the other colors and it worked up nice. I probably won't try to use the rest of the roll.
But I would buy the solid colors mentioned in a stitch, especially at two for the price of one.