This is a great medium concentration game.  The strategy is not too tricky, but challenging enough to hold your interest.  Basically, you either collect or play train cards on your turn.  You need to have the same number and color to play on a route, and then you connect your routes to match the bonus on your ticket.  The score for routes increases by the number of train cards needed, from 1 point for 1 to 15 points for 6.  My only complaint is that there are a few tickets that might be weighted a little high and lucking into one of these on the initial draw gives a slight advantage.  You get a higher bonus to connect farther apart cities, but some of these have longer routes between them which give you a bonus already.  Overall, a solid and very fun game.