Lots and lots of glitches. It takes quite a bit of figuring out to play this game properly and i would suggest that most people have a taster season or two, then start again from fresh. The live racing is really great but suffers from problems. Back makers weaving across the road for half a lap losing you 5 seconds or more is a regular occurance. It's frustrating when a car crashes into you and you get the penalty. If you Work hard over a few seasons to get your team to the front of the pack and the game automatically gives the Red Bulls a nerf to keep them ahead, especially at the start of each season. Keeping the team within budget and competitive is very hard at some teams ( Mercedes being the worse for some reason).