I put on the roof rails to work with cross bars (haven't got the bars yet, will likely go with Thule) for carrying bikes/kayaks. I haven't heard of anyone going the route of cross bars with "feet". As I recall, those require hooking around the roof lip at the doors to attach. If they work, that would save $500-$600 for the roof rails - but I'm not sure how well they'd work since I really didn't even consider that option. While the roof rails are pricey, they are very easy to self install, and really look good (IMHO). I'd be interested to see how well the "feet" cross bars work...