Had a VW Caddy for 18 months, hardly any probs,and just got a VW transporter, but it depends which salesman you talk to obviously, If they're trying to sell you a renault, they're not going to tell you how good VW are, the VW seller told me lots of bad things about about vivaro/traffic, which may or may not be true, but there are plenty of independent reviews online to help you decide
Lee