I played the one at Sunshine Laundromat, and it's a beautiful machine. It is a lot of fun to play. It got most of my quarters that night, with Dialed In getting almost as many. Lebowski is well laid out, it is fun to shoots. I kept flipping the wrong way to spell Maude, but that's my issue. I was probably distracted by the bowling balls.
It has good callouts. The color display is used just enough to show the right clips at the right time. I'll agree the flippers felt a bit weak, but that's probably a setting or an aftermarket coil. I have a GNR, and the G ramp is steep. Lebowski has the same "little engine that could" feel when you shoot up the big left ramp. That's a minor issue that could be resolved by sucking less.
The upper playfield is awesome, especially the car. That's a ton of fun.
The only real issue is that the rug toy was already down to black rubber that had some rips. Doesn't affect play, but the visual is wrecked. Let's hope Neopost can rock the manufacturing and get the rest of the games out. I want to play it again!