The train is fine if you intend to use it as it comes. However if you purchase more than 2 train cars, the train's motor is barely strong enough to pull 3 cars and it cannot pull 4. The train can't make the bend with more than 2 train cars, unless you put straight pieces in to make long loops.
Speaking of track, I was going to purchase a second train set BECAUSE YOU CAN'T PURCHASE MORE TRACK SEPARATELY (BAD HASBRO, BAD!), but WON'T now that I know I'd have to take out the existing train motor and put a stronger one in.
I may still try to craft some more track(thinking paper mache might work,) but feel that I shouldn't have to put that much effort into it in the age of internet shopping.
In the end, our pony train won't run a loop around the Christmas tree. I guess that spot is still taken by boy's toys.
Side comment: I was impressed that the pony train luggage and purses actually opened and closed. The paper tickets that came with the train set were a nice touch as well.