Everything about the game seemed great. Aside from wishing the volume was louder, I do have one small critical gameplay comment.
I feel like when you make a ramp shot, you shouldn't be punished.
On the last game I played after two made ramps, the ball somehow escaped out of the left return and went into that outlane area with the posts. Super disappointing. Maybe I just had some bad luck, but on two consecutive balls (2 & 3) it was a disappointment and led to a shorter experience. Guessing this is good news for operators with the shorter ball times But maybe it was just one of those games where shit goes sideways. A few more games I'd be able to give better perspective on the left side drain issue.
ETA: With SunKing's info, now I understand why one of the three games was being played without playfield glass. I only got to play that one (twice during the whole weekend). If I'd have known about the issue, I'd have let others by to play it and waited for one with glass on it.
On the second time, that wasn't possible. I assume it was SunKing who said to me "sorry to do this to you" and turned off the machine on the right, which is the one I was set to play.
Can't really say whether I'm in on Alien or not yet... hope to play it more in the future and figure it out. So far not an insta-buy... but contemplating a buy.