They are ok, but ive found parts are harder to get in Australia, not many sellers online stock HBX parts and there is no aftermarket support parts. Oh and the parts are about 30-60% more expensive compare to Tamiya, losi, traxxas etc
The HBX max and bonzer are good, they are a 99% clone of a Tamiya TL01b like the tamiya BAJA King and champ
There is a massive amount of spare parts from Tamiya and other Manifactures for them.
I've found everything expensive here in Australia, and ordering online so far is the cheapest way to go
Those HBX clones of the tamiya TL01 are on eBay for $129 with free postage, And are fast for a brushed 4 wheel drive buggy.
They come with everything u need just add some AA batteries to the controller and charge the cars battery up.
Would recomend getting a better charger and a bigger batter for faster charge times and longer run times
http://www.ebay.com.au/itm/1-10-Radi...ht_6359wt_1054
Other things to look at would be these
All Tamiya
Plasma edge
Gravel Hound
Rising Storm
Desert Gator
Sand Viper