If you can, range test it first before trusting it at all. Stand the truck up on it's rear so you can see the front tires move when turning the wheel, then walk until it stops working or until you can't see it. Not a great test, but better than having it get 50 feet away from you and take off.
That said, when you bind the receiver to the transmitter, it will use the position the servos are at at the time of binding as 'home' for when it looses reception (built in fail safe). So just make sure your steering is pointing straight and your throttle is at idle when you bind. I never set my fail safe to lock up the brakes as that can cause more issues than idle... I've had the FS kick in off a jump before. Full brakes off a jump causes an immediate uncontrolled flip. That was when I used a normal FS.
Whenever I lost reception with the DX3S, the FS position is where it would go. I never had "glitching", just reception loss after a short distance.
With my DX3.0 and normal receivers, I can go further than I can see, but now that people have mentioned the telemetry receiver may be part of the issue, I'll find out what kind of range it has with my DX3.0 when I take my buggy out as it was the only spare receiver I had.
I know the DX3S had issues with range with both the telemetry receiver and my normal receivers as I had the telemetry one in my revo and one of the normal ones in my 5B, both suffered from short range.