Here are my Ork Trukks from my most recent game. Alas this photograph is slightly blurred.
Though they did not last long against Simon’s Imperial forces, actually now I can’t remember what took them out, I think it was the Space Marine Whirlwind.
I didn’t use them as transports either (which is usually the best way of using them) merely as gun platforms and not even very good gun platforms as I only had Big Shootaz on them. Having said that, they did take out a fair few Imperial Guard before they were lost.
You can see my workbench features on my Trukks, here and here, and I also have a gallery of Ork Trukks.