It's all personal taste and opinion...like buying a new car. The aftermarket business is a billion dollar a year business. Are any mods necessary? No, the product will perform quite well out of the gate. Are there any recommendations? Yes, of course. All are intended to make your smoking experience more enjoyable.
Me, I put 4 garage door handles on the body for easy lifting and transport. I also bought another charcoal grate, which fits right inside the charcoal ring. It not only closes off the gaps (which allow full lit charcoal to slip through to the bottom of the base), but it I also can criss-cross the grates, which will hold lump charcoal better.