We ate here and had a fantastic, memorable evening.
It's pretty much the only fine-dining experience in the Cinque Terre (with the possible exception of the Belforte in Vernazza) and is well worth the trip.
It's set in a much smaller village high above Riomaggiore, so you need to actually catch a train to Manarola and take one of the green shuttle buses up to a sleepy little town called Groppo. It's about a 10 min ride, although apparently some people do hike up there! The town is as quaint as they come, perched on the side of a mountain, seemingly lifeless while you walk round it looking for the restaurant.
It's run by a husband and wife duo, the husband being the chef, and the wife being the hostess/waitress.
The food is exquisite - creative, fresh, tasty seafood dishes, often with a twist - the type of twists that actually work! The hostess makes a real effort to make you feel at home, conversing in multiple languages with the different guests while we were there, and taking time to explain the menu and offer wine pairings. It's clear the chef takes a great deal of pride in his work, all the dishes are crafted superbly - taste and presentation are perfect. As the tourist buses stop running about 8pm, the owners drove us back down to Manarola afterwards to catch the train, which was really very sweet of them.
In the spirit of providing constructive feedback, I would only add that service was a tad slow and at times seemed fraught. Though there were only 6 tables to serve it did seem like it was a struggle at times for them to keep on top of it.
This doesn't detract from the experience at all, however, which is well worth the journey and the expense. This is truly the finest restaurant in the Cinque Terre. Exceptional.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.