Just tried it out.
Very nice :), almost no lag.
Things to say
-I played 6v6, very entertaining :). I got challenged and as I was laddering with my rain dance team I decided to use it :). Needless to say I got tricked on two pokemon and they were made redundant for the rest of the match. Very gimicky match-up but fun nevertheless
-Not many people play VGC and then when I entered my level 100 Team, I left it for a long time before I realised level 100 pokes weren't allowed ;). It would be nice if there was an "Error" pop-up to remind you that you're pokemon were over level 50.
-No Cancel attack option
-When you're switching pokemon it would be nice to see their HP remaining instead of just a green bar :)
That is all I can think of, for now ;)