I bought C30 four and half years ago used with 20K. The handsome external design expresses my style well. It is practical (overall small size, with easy back seat conversion to increased cargo volume), well balance (power and mileage), and simple inside. I used it to transport tools and materials for home improvement, to take my dog to the park, to go skiing (roof ski rack), and to go on hikes from trail heads far into the Washington state Cascade mountain roads. This car does all of this at good mileage, reliable services, and sporty feel. At 85K, so far I had no unscheduled repairs. If you want luxury handling and interior noise level, with plenty of power for passing and roadstering, at small fuel mileage penalty, get it!
I'm a 25-year-old graphic designer who commutes about 45 minutes into Washington, DC from a Maryland suburb each day. I wanted a compact hatchback that was looked good, was unique and had enough power to satisfy my occasional lead foot. It also needed to be comfortable and have enough features to make the drive less of a chore. I loved the styling from the time it was unveiled, so when I needed my next car, I decided to check it out. I didn't test any other cars. It is smooth, solid, quiet, shifts effortlessly and returns fair gas mileage. I would say the gas mileage is my only complaint, but since I also often use public transportation, it's less of a problem. They're rare to find, but worth a look if you stumble across one.
If you enjoy driving, the R-Design is a different car than the regular C30. Great power (225hp), tight steering, firm suspension, quality can be felt and wind noise is almost nonexistent. I would recommend this car for the enthusiast but it's not a convenient family car because rear seat access is not something you want to deal with regularly. Rear tires wear quickly but if your alignment shop is really good, rear settings can be altered slightly to help with that. Factory brake pads are good but dust the rear wheels heavily and I am happier with EBC Red pads on back and will probably go to them on front also. Water in floor (frt or rear) could be sunroof drains in A pillars (short tube or plugged @ firewall) search youtube or Volvo forums.