I ran it today in my sideboard for an invitational where I was expecting to see a lot of shops matches. I had it once and it did exactly what I expected - drew it mid game, played it while I was slightly behind on the board and just flipped the board state completely. Unfortunately I missed 2 sacs to a ravager later that cost me the game. But if not for memory jar, I would have lost probably 2 turns later. Instead we went another good 8-9 turns.
I rather enjoyed having it in my side for the mirror. I dont believe I would want it against any other match up. This is also the first time in 2 years I've run shops so I'm hardly an experienced pilot.