The Aurox is to the Imperial Army what the Rhino is to the Space Marines. The design philosophy of both are incredibly similar: they needed to be able to be mass produced, and to be able to be repaired and allow for additional load outs in the field.
Beyond that, this is the standard transport solution for the troops of the Imperial Army, Solar Auxilia, as well as the Cultist armies in 30k.
I regard the points cost of the Aurox as cheap and cheerful and therefore an asset not to be over-looked.
In a case of "you get what you pay for", the Aurox is not well armed or armoured in the grand scheme of things. These transport boxes will blow up regularly, and that's just to be expected.
The Aurox comes in two baseline flavours: one for the Solar Auxilia and one for everyone else. The only difference is that the Solar Auxilia get the Explorator Adaption upgrade included, and have slightly more options.
Aurox (Solar Auxilia) with multi-laser (35 points).
I kind of like the multi-laser, but by all means keep the heavy stubber instead, or take the heavy flamer. The extra armour is a nice optional upgrade here.
Aurox (Everyone Else) with heavy stubber (25 points).
Not much to say here. The heavy flamer is tempting against some armies, but otherwise stick with the heavy stubber.