People, the guy lives in the Czech Republic. "In Czech Republic Best Buys you!" Even if you can get it shipped from a US company, you still have to pay their import taxes.
Tron is a solid title. The spinning disc adds a bit of randomness but it's not nearly as bad as people are saying. It's no worse than the magnets on TAF. It's less pronounced than the AMP suit on Avatar, the Monger on Iron Man and the Buck on Big Buck Hunter (by far the worst of the aforementioned).
The disc is way at the top of the playfield so no matter what it does you have enough time to react.
The rules are fairly simple. You complete the modes to get to Portal Multiball. A couple modes are "throwaway" modes that are super easy to get. A couple are quite difficult, such as Gem and Disc.
Several modes can be stacked, and further stacked with a TRON award and Fast scoring (the most useful is double scoring), and triple stacked if you can work shot combos in. The points can get really incredible, however, the difficult increases as well.
I think at this point in the code, the game is initially fun trying to defeat portal multiball. If you are a fan of stacks and combos, the game has quite a bit of life left afterward. If that's not your thing, you might get bored.