I consider the original Black Knight (1980) with two levels, 4 banks of hurry-up drops, a horseshoe, 2 magna saves with actual side buttons, and a spinner shot -- the 5th best game, EVER designed, so I had my hopes up high for the third installment... My first aspect to consider in a pin review is "how does it shoot" -- the physics -- the layout (disregarding art, sound, rules, programming, etc) on a first take...
I played the Pro at Free Gold Watch, on it's second day there. It was set up well.
I didn't have fun playing it -- I felt discouraged by the wall-of-five-posts layout. I bricked shots that insta-drained. I even had an airball fly over the flippers.
I did learn something though -- this game design taught me that saving a bricked shot is part of the fun of pinball, and when that aspect is removed from a game -- the game is much less fun. So I've added a new idea to my review template, "brick saveability".
Think back to 1981 -- and how you generally want to avoid the middle area of Silverball Mania -- only, add one more post, and add two flat targets, and remove the two safe shots on the outside -- that's BK3. There are no safe shots. I've never seen a game take that stubborn of a design approach, and frankly, I don't think it's good for pinball.
I can imagine some expert players enjoying this -- but some novices will play 1 ball and walk away. I reluctantly finished out my 3 balls. I played another 4-5 hours of pinball on games like dp and iron maiden with far more interesting layouts, and returned to try again, only to have the same frustrating experience.