Hi there,
I've owned one since the start of this year and so far its been fantastic no parts have shown any sign of wear yet, all that needs doing every so often is doing the usual checks that nothing has come loose, the only weak part on the car now i'd say is the front shock shafts and front A arms which is a weakness on other cars too as they are first thing to make contact in most crashes, the build is really good it's simple and easy to understand, the handling of the car is very good it's predictable and quick, one upgrade i would buy for it is a front oneway diff which makes it even better in most peoples opinion. A good cheap usa shop to buy from would be losi parts house:
http://www.losipartshouse.com/servlet/the-26851/ASC9060-Factory-Team-B44/Detail
Hope this helps
Mike.