Was invited to the launch of the C70 and was pretty interested in it, but....
Looks wise it appears snub-nosed at the front. Interior appears of high-quality (we have an XC90 and are impressed with the fit and finish of that.) The roof mechanism is impressive, but also very complex, with panels sliding over each other and lots of exposed cables ' doing their thing '.
All of this doesn't matter though. To make enough room for the roof they have done away totally with the spare wheel - you get an aerosol of foam to make temporary repairs. (i.e. fill the tyre with foam instead of air!) They claim a greater boot (trunk) size than the Saab, but, unless you're using soft bags, it's not really all useable, the Saab takes a large suitcase plus a couple of samsonite 'wheelies' even with the roof down; I couldn't even get my suitcase into the space the Volvo has left (due to shape rather than out and out size). The final irritation for me is that to actually access the boot space when the roof is lowered, you have to press another button to lift the whole mechanism out of the way! (I know a lot of the other hardtop/convertibles suffer the same problem.)
In short, for me, the Volvo is just not practical. Whenever I can I drive to work with the roof down, and anything more than a 'nightstop' trip means I have a suitcase + wheelie to stick in the boot. A shame really, as since my car spends so much time sat at the airport exposed to the elements I thought a hardtop might have been better.
Just my 2 cents, and for others, the Volvo will be pretty good.