I don't know how I lived without
Souveran. As far as durability goes, I'd say it will last at least a month. I washed my wife's car yesterday and the one layer of Souveran that I applied on March 26 was still beading. It has been through one hell of a sand storm on monday and 3 days of really weird weather. Its been raining and snowing and hailing ALL IN THE SAME DAY! I think that that car has been through every weather extreme in the last week that a car can go through. We saw 80 degrees on Monday and 20 degrees last night. I think that Souveran holds up pretty well IMO. We'll see in another 3 weeks how well it does.
edit: psst!
Its still $49.99 a can here if you are looking for some. It is worth every cent of $70 but if you can get it for a little less then I say do it. Might as well take advantage of it before it goes bye bye.