How good is the "single step" Keying filter in Motion 5?
 

I've got a green screen job coming up this week. Last time I did one, I used the Primatte RT keyer in Motion 3 and it gave an excellent result. But it was very onerous to animate the B-Spline Mask Tool as a part of getting such a good result.

I don't have Motion 5, but I noticed that the blurb in the App Store for Motion 5 says, "Stunning Effects: Create an accurate chroma key in a single step with the new Keying filter."

So, before I drop $51.99 on getting Motion 5 (and I'd only be getting it for the single-step keyer), I was wondering what sort of results people were getting with this new keyer in Motion 5.

Does it give a really good result (assuming the green screen footage is reasonably well-shot)?

As good (or better?) than the Primatte RT keyer in earlier Motion versions?

Thanks very much in advance to anyone who responds with their experiences.