I bought my 2002 C70 used in 2009. It ran great for about 6 months & then had a host of problems that caused multiple trips to the shop, including one that lasted 3 months. The car doesn't always start. Turning the key over and trying again sometimes works, but Volvo told me that trick as they can't fix it. The transmission slips & it has gotten progressively worse to the point that the car is only reliable for trips under 15 min. Volvo can't diagnose that problem either & suggested changing the trans, but will not guarantee that it's the fix. The rear windshield has dropped & is suspended by the headliner. I need an auto upholstery shop to stitch it back in as the glue won't hold.
The C70 is very enjoyable to drive with the top down. Otherwise it is one of the least enjoyable cars we have owned. The suspension is too stiff for a convertible as that has led to numerous squeaks and rattles for which the dealer has no solution. One would never know it has power steering and the turning radius is far too wide. Trunk is negligible as is true with many convertibles. There is no indicator on the dash showing what gear you or in - just a small silly orange arrow pointing up if you are not in top gear. The parking light assembly simply fell out. Leather seats are showing significant wear after only about 30,000 miles. The mechanism for lowering the top works well.
When my wife lets me drive her C70 it can be day when I ejoy driving again. This is a great car. When yuo hit the turbo hold on. My usual commuter car is a 2000 BMW 528i but in comparison the Bimmer is just taking the family car to work. The C70 is just plain fun to drive.