I use the Mercedes roof bars Thule ProRide 591. They work great. I would have got the Thule roof rails, but the Merc ones were cheaper than the Thule Aero.
The Mercedes ones are similar to the Thule windbar, they look good, but are less practical as the useable rail ends at the mount. With Other types, the rail extends beyond the mount so you can carry bigger stuff.
I can fit the rails and the carrier in under 5 minutes.