personally, I would buy the blitz or ofna if youre gonna race. I have a 4x4 slash. I've broken so many things its not even funny anymore.

Heres a few things that I can remember off the top of my head. Most of them have broken more than once.

rear hub carriers
front a-arms
rear a-arms (technically not broken but hingpin bolts will no longer tighten after two times of taking them out of the a-arms)
front and rear shock towers (shock mount bolts will no longer get tight)
front diff drive hub
axles
slipper clutch bushing (not sure what traxxas calls it)
bent shock shafts
numerous bearing failures
motor and speed control
body mounts (mostly rear) I know this is almost a given to break, but they seem to break on the smallest crash.
spur gear

I know a few of these items are fixable and wear and tear parts, but they seem to wear out way premature IMO.

another thing that sucks is that alot of places dont carry parts yet, or as soon as they come in they are sold out. I can only assume everyone else is having the same breakage as me.

I have about 7 buddies that have the blitz, all with brushless systems on lipos. I would say 4 out of 7 are VERY abusive drivers. The only part that I have seen them break is the dogbones and that was after about one straight month of HARD driving.

I have a 7 year old and 3 1/2 year old. I bought them both blitzs. I figure if my buddies cant break them theres no way my kids can