It is a great deal. I opened it up because I was fiddling with the tracks (unfortunately side screws are under the track so you have to take the track out to open it up). Neat and tidy. Runs great, nice sound, everything works beautifully. I thought the scale idler adjuster might work but not enough to tighten the tracks. So either it is pretty loose or tight if you take one track link out. Nylon tracks by the way, and rubber rims.
For $130 USD it is unbeatable. I am not going to put in any electronics. Just leave it as is, even using the case it come in as a carrier. Cool radio. It is a really nice little tank.
BTW, servo recoil and serve elevation. If you read the instructions it seems to indicate that the board has battling capability. It talks about resetting lives and stuff.
Love it.