Congratulations on your purchase. The RC10GT is indeed a great truck, and is pretty competitive righ out of the box.
Just be sure to get the RPM receiver box, it sells for around $8-9 bucks. But it's worth it. If you plan on jumping ramps you may want to replace the pivot ball holders on your tie rods with some GS racing tie rod ends and place a washer between the screw and tie rod end. The pivot balls pop off too easily.
Have fun!