Used to have a V40 T4 and it was the most unreliable car I have ever had and I am not talking small things either.
Turbo at 25k, head gasket times 3 at about 55k and finally auto box failure at 75k.
My dad has an S80 and it has not been very reliable either with a lot of electrical problems.
I've been in a C30 and the ride is terrible and interior quality dire.
The new S40/V50 is pretty rubbish as well on the drives I have had in them - the floating centre console thingy is a plethora of tiny buttons and not user friendly and the ignition key slot is behind the indicator stalk high on the dash and so is awkward to get to.