Very bad music, and comments are submitted is every few seconds. This sucks a lot, but can be turned off. There are almost only techno music, but something of grottig. As if a small child had quickly done with a music program a soundtrack. The routes are often repetitive. Although it is touted that there are many there, but there are only 4 landscapes and some stretching, then moves in the opposite direction. Rather obsessive appear landscape details like cows or helicopter.
Damage can accept no vehicles, but that is in many racing games. If you drive at 200 km / h against a wall you lose hold time and it makes "Tock" - which arrives like a clap in the player's ear.
So, for me the Siel's just something for a few minutes, if you even want to create a route. Once I play longer it gets boring.