Hi Matteo,

A pretty solid choice, reliability wise. The only recurrent problems on Kugas seem to be a diesel particulate filter that's prone to clogging. A good run on the motorway should clear it out but if it persists it can be an expensive job to fix. They can suffer from a stiff brake pedal action too, which can lead to longer stopping distances. Should have been fixed as part of a recall but make sure the one you're looking at has been checked. 

As ever when buying private though, insist on a full service history and get a independent history and finance check with the likes of Cartell.ie.