A mate at my work has got one as a daily driver, All i can say is the ain't built for it, After enduring it for nearly 3 years through all weather he has now finally succumb to getting another car for winter.
Getting in and out of them is art-form (Especially if you want to keep any dignity)
Snow in these is a no go (not enough weight over the front wheels)
Heaters are very poor, so clearing the windows on a winter morning is fun
Visibility becomes a very large issue in the winter due to dark night (even so much that my mate had built a full perspex roof for better light in the winter)
They all leak water, with softtop or hardtop.
And any kind of work other than a service involves taking the rear clamshell off so add a extra 2 hours labour to the bill.
But that all said there are awesome fun to drive (just a bit tedious if you have to use everyday)