Average
The wine-tasting detour felt a bit forced, but as it's included in the price, you might as well take part. The guide (Eva/Effie, not sure) was great - very polite, caring and clearly loves her job - but she didn't give much of a tour in Argostoli apart from a short walk to the main square with some explanations on the way. Overall, I'd say it's a reliable way of getting to the capital with some extra sightseeing, just prepare beforehand on what to do when you get there to save on time!