RE: What Problames Should I Expect???
The Savage X RTR is a very good truck overall. HPI are currently offering a free X SS Upgrade Bag with every new Savage X purchase, which includes a Racing Clutch Bell, Steel Spur Gear, Steel Differentials Gears, and Aluminium Differential Cups. These parts will eliminate most of the problems with the stock Savage X, and will make it much tougher.
The stock servos are very weak, so you should replace them with good Hitec ones. The stock transmitter and receiver are also bad, and you should consider getting the Spektrum DX3.0 Package, which is currently the best around.