Finally a good car themed table. You won't regret getting Knight Rider. Very buggy though. Score display sometimes gets stuck and breaks the table. Extra ball is often unattainable, even though it is flashing and you land the shot, whether it is because of a mission or because of multiball. The return lanes are a little unpredictable.
Xena is unfortunately a pretty terrible table. It's a shame too, because the table does have interesting parts. Watching the ball do laps on the chakrams is fun. The Callisto and Gaby missions are interesting. The mini-table is good - if you can reach it. The frustrations come from the unreasonably difficult and uninspired layout. The slings send the ball straight into the outlane with nudges rarely saving the ball. It's all ramps. There's a lot of drop-targets in mission/events in the lower half of the table, which often sends the ball down the outlane. Even the kickback launches the ball into the opposing outlane to trigger the other kickback too. Terrible. The missions are borderline impossible to complete - during my first 10 hours on this table I completed zero missions and I'm TOP3 on the Infinity Gauntlet table. I did eventually reach the wizard mode after some grind, but it was infuriating.
Battlestar Galactica is the best table in this pack. Never watched the TV show back in the day, but the table very quickly became one of my favourites. It's a steep, fast-paced table. It has some of the most well designed missions I've ever experienced, pure bliss. Only the videomode is a little too basic and too easy, but everything else is perfect.
EDIT: Don't forget to set physics to Realistic when playing the table for the first time, because it defaults to Normal.