Covercraft
I have owned all three covers (Slippery, OEM, and Covercraft)
Slippery - features - Extra Straps, Zipper to access tray and fuel cap, heavy duty nylon (better than OEM and Covercraft) Excellent fit
OEM - features -Vaccum hold, quality nylon (not as heavy as the slippery) Excellent fit can be a little too tight if the bar aren't perfect straight,
Covercraft - features - Zippers to access tray and fuel cap, Good nylon (not as heavy as Slippery or OEM) excellent fit
All three of these trailer well. My favorite was Slippery because it was easier to get on and it let me access tray to stow stuff without un doing the tiedowns. The OEM look very cool graphics and have a tight fit, Sometimes a pain to get on. Covercraft is a excellent fitting cover at a great price.
Just my 2 cent.