I thought it was very nice the first time out. The second time it had lost tension and played like a different string. The third time it lost even more tension and then was like a trampoline. I cut it out after that. If a string doesn't settle in and stop losing tension after an hour or so I tend to not like it. This string was one of the worst I have tried in that regard, and I don't recommend it.
As far as string movement goes, it behaves pretty much like a multi does. A little movement at first, then a lot later.