Auto Express have posted their initial impressions of the BMW 335i Coupe which is the company's first ever folding hard-top. 'It's the big 'opening day' for the new 3-Series Convertible - the moment when BMW's first-ever folding hard-top takes center stage. The fourth-generation model has ditched the traditional canvas hood in the search for better refinement, security and structural stiffness.With only Volvo's C70 offering a similar arrangement in the sector, it gives the newcomer an important edge over the Audi A4 Cabriolet and Mercedes' CLK. However, the new roof isn't the sole innovation. There are special heat-reflective leather seats designed to keep the cabin cool, as well as the firm's latest twin-turbo six-cylinder petrol engine. So is the new 3-Series Convertible the best drop-top on the market?'