We went to Meganisi only for a day from Nydri Lefkada. I personally liked it a lot. Picturesque villages, great beaches, delicious seafood. We didn't see a lot of the island, just Vathi and the nearest beach, but I felt it would be a cool weekend destination. In winter, though, things must be pretty tough for the permanent residents. I was also amazed that there was so much greenery on such a tiny island.