My experiences - 2005 Roadster has been superb. Extremely well sorted. The paintwork might have been a bit better, but the only fault is that the sump clearance issue ought to have been dealt with. There are also a couple of holes in the wrong place in the floorboards.......................
2012 - Better paintwork by a long way but with the sagging rear springs. Once sorted, a good year and the Duratec with the Mx5 box is probably the best Plus 4.
2016 - better paintwork, but still not 'perfect'. Very well sorted ride. Overall very good quality.