Most cab guars have solid sheet metal to about the middle of the hood. A full cab guard is a huge airfoil, one of my buckets has a full sheetmetal guard and it is noticably different going down the road.
I prefer only having the solid cover to about the middle of the hood. This keeps the cab shaded but still allows some visibility when looking forward towards the traffic lights. I would not want a solid cover all the way forward.
looks like steves is set up right, sheet steel over most of it and expanded metal over the rest. plenty of shade with that setup and i concur, any more and youd have to get out of the truck to see the stop light