I have never seen one in person yet but it doesn't look like from the many photos on google search to provide much shade. Being on the rear end just does not give you much area for shading.
I guess every bit of shade you can get is worth the effort...
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS