I know when i was first looking at going into wfp from trad and looking at all my options, the need to have everything orange by this company just put me off from looking further into it.
Several years later and Im still of the same mind set. Another friend was looking into their trolley systems and when we got talking about it, he decided against it. Again the reasoning behind that was the colour, "you know when youve been tango'd" just screams out at you!
Also like "big kahuna" says, once you have DIY a van, I just see money wasted in buying a full van system. Of course, Daz will disagree!
On you tube for instance, I have seen many a DIY system that look very smart and tidy. In essence, if you have forethought and patience, you can make the inside of your work van very impressive. Yet, really, who are these ones trying to impress?! If not other shiners.
You have the arguement that its easier and faff free but to counter that, a diy'er knows their system inside and out.