It's a pretty good game of pinball. Specifically, video game pinball. The physics work pretty well, and the graphics are solid. Very rarely have I encountered a problem while playing. I can only remember one instance of a ball getting stuck because of a bug.
Edit: Something I wanted to point about my video game pinball comment. What I mean is that these tables are designed to be played longer than the real life counterpart(because they want your money of course). Therefore they have more extra balls you can earn, kickbacks and so on. You can even nudge the table in ways you couldn't do in real life, either because of personal injury or damaging the table itself. Be warned though, most tables will only give you two chances in a period of time before tilting out on you, but it sure can be fun to save a ball that otherwise would have been lost.
One last thing that relates to the fact this is video game pinball, when you exit out a game in progress, the game will be saved, so don't worry if something comes up, or if you're just having a really good game but you can't play in one sitting.
The one thing that appeals to me about pinball is that you're always trying to get better, so that you can continue to improve and of course get a better score. One thing that also helps is comparing how well you do with your friends. I have a number of Steam friends just so I can have scores to compare with and try to beat.
I would say overall, the quality of the tables are fantastic. If I have any complaints, it's mostly about the selection-it's that Star Wars and Marvel theme tables dominate the catalog. Now don't get me wrong, I like Star Wars, and I love the Marvel Cinematic Universe, but it would be cool to see different properties more often. (BTW, get Guardians of the Galaxy, and the Star Wars Balance of the Force pack-Starfighter Assault is my favorite table)
I play with my X-Box 360 controller, it works really well with the game.
I also have my second monitor on portrait mode, which makes a huge difference in seeing the table. If you can have that setup I totally recommend it.
I never got to play real pinball that much, there's no arcades where I live, and of course getting a real machine is very expensive, so I think this is a good alternative. And the price for tables is decent.
Also, there is a free table, and you can try all the tables to see what they're like.
I recommend this game. Have fun, and may the bumpers be with you.