No leaking or other top troubles with my 3 year old (in 13 days) E93.
I realize I am in the minority on this forum, but I see no need to the air deflector. One of the reasons I have two convertibles is because I want the feel of the wind blowing around. If I didn't I would just get a E92 with a sunroof.
2010 328 E93 Titanium|Black|Aluminum
1973 Datsun 240Z
1966 MGB Roadster