I was fortunate to see one of these, as a prototype early on, while Al was still developing the gorgeous jig he built for them, and can testify that the quality is A1! Looking at the price for a chassis with axles, bushings, wheels and inserts, you are getting the chassis for about $10 US!!
Looks like a pretty awesome deal!
And no... I am not affiliated with BWA.

Looks like a pretty awesome deal!
And no... I am not affiliated with BWA.