It depends upon how far you want to go.

The included plastic can be made to look fairly good with a little work...

But you can always improve on this...

e.g.

[link=http://www.southeastrc.com/Items/StdItemView.aspx?lookup=GPMA2806]Good[/link]
[link=http://www.franktiano.com/scaleproductFrameset.htm]Better[/link]
or

[link=http://www.williamsbrothersmodelproducts.com/rc.html]Insanely detailed[/link]