I got my Xbox chipped two weeks ago and have not had one single problem so far, but I don't know if they used an Enigmah or Xtender chip. Is there any way I can find out without removing the cover??

nope, you need to look inside, and also i believe you need to take the mobo out, as the chip is on the back of it.

Heres as idea ,just ask them what kind of chip is in there....

Hmm...If I'm not mistaking xtender comes with eject without reset, so if you xbox is capable of this, then it's not an Enigmah. Or maybe it's only Xtender beta chips that did so???! I'm not sure..