I raced my Matrix for the first time yesterday. The buggy is rock solid and handles well. A lot of people were impressed with the large shocks and the beefy suspension parts. The only problem I had was with the temps. The engine flamed out once. It was as high as 340 degrees. I used the needle settings from Cen and it continues to run extremely hot. It is confusing because I had a nice trail of blue smoke. I am going to go out this week to try and find the correct settings for this engine. Other than the engine problem, the buggy was awesome.