I have not had any major issues. I have broken driveshafts before but they were the very first ones. So I upgrade to the newer version everytime the stock breaks. I think the kits now come with the newer ones so you should be good to go. Other than that the car is AWSOME! Handles really well I also like with Agaman because every little change you make in the pits you feel a big difference on the track and it shows in lap times, as I did not notice as much with the losi. I love the durability of the car though I have made some mistakes where my car has taken a few good hits and it still keeps on ticken.
Let me know for any questions with the buggy as I would love to help.
KEEP A LOOK OUT FOR GENES STUFF! EVERYTHING GOT STOLEN. SEE THE AGAMA THREAD!!!