Frog Tape for Cleaner Edges?

We've made the mistake of overestimating the power of blue painter's tape before - it led to blotchy edges and a headache. But this green painter's tape promises to live up to our old lofty expectations...

Frog tape has a thin layer of "paint block technology" (some sort of gelling agent) on each edge, which basically turns the paint into a solid before it can creep under your tape. The reviews we've read so far have been positive, but we'd like to hear if any of you have tried it. Thoughts?
Via This Old House