BECAUSE it offers a cosmopolitan experience at the price of a regular Japanese small car, Holden’s Astra is the darling of Euro-conscious Australian car buyers. But is it good enough to move up a few notches and, in convertible form, compete at the bottom-end of the prestige market? Buyer reaction seems to indicate it is, and the addition of a more powerful turbo variant should only elevate Holden’s dominance among small convertibles sold here. Really, there doesn’t appear too much wrong with this zappy, well-equipped and reasonably spacious four-seat soft-top.