Thanks everyone, the rails on my car are same as on 808's Mini Cooper.
So 808, I already have a quality set of roof bars (Thule) but the way they attach to the roof rails worries me. There is only a slight lip on the rails which the bar-feet clip under. My old car had the raised rails and the roof bars clamped to them very securely, almost wrapping right under the rails.
Have you done any long trips and highway speeds, any problems, are they secure?
Thanks.
New-style rails
Old-style Raised rails