Don't be fooled with all the good reviews and beautiful photos of this place. I would not recommend it to anyone.
This place consists of renovated appartments where we were staying (marked with 4 stars), nonrenovated appartments (marked with 2 stars), and the camp.
I really cannot complain about the appartment since they were clean and everything was new. But you have to be careful that Amarin complex is on the hill and when we arrived I realised how incredibly lucky we were since we got the appartment closest to the beach. We could have ended up in the hills and it would be a long walk to the restaurant and the beach. Everything else in this complex was a great disappointment.
In order to get to the restaurant since we had half board, we had to walk past 2 stars appartments which looked claustrophobic and spooky. And the camp site was terrible. There was our restaurant overcrowded every single day. It was hard to find an empty table, and the choice of food was every day the same. Meat or fish with chips and some pasta. It wasn't tasty at all and I am not picky when it comes to food.
The greatest disappointment was the beach which looked perfect on the photos. But when I tried to get in the water I hurt my leg and I got a few more bruises even with the some kind of swimming shoes I wore. There were huge stones under the surface and it was really dangerous to get inside the water especially if there were some waves. It was impossible for my six year old son to get inside the sea so he swam in the pool. But that's another problem the pool is not that big and it's shallow since it was built for children. However since people cannot get inside the water they were all in the pool old and young. It was overcrowded with screaming teenagers trying to jump on the head. A horror.
In order to save our holiday from the complete disaster we decided to go sightseeing. We saw Pula, Brioni, Porec, Rovinj, Umag. Rovinj is a beautiful old town which I recommend everyone to visit. But do not stay in Amarin.

Apartment was clean and spacious. The beach is rocky, o you need to wear swimshoes en a yoga-mat to lay on. Sea is clean and warm. Taxi boat to Rovinj is great. Receptionists are grumpy and aren't very helpfull. Renting bikes, canoe's , boats is possible, but overpriced. Overall a nice place to rest. The surroundings are beautifull and romantic.

We rented an apartment in the tourist resort Amarin. The apartment was clean, comfortable and extremely convenient. We were there in low season, and it was excellent value for the money (20 euros per person), but the hours of on-site services (internet shop, market) were unpredictable. The resort is located 4 km from Rovinj, so it is easier to get to Rovinj if you have a car, although shuttles are available at the resort (not included in the price). We would definitely recommend it.

We have just returned from a week at Amarin - apparently it's busiest week of the year. We had a 'renovated' B5 appartment (1 double bedroom and 1 single bedroom) for 3 of us. The appartment was great. It was exactly like the pictures - modern, 2 balconies, small bathroom and airconditioning. The appartment also provided outdoor furniture (table, chairs and umbrella and towel/clothes rack). This was perfect as we took our portable BBQ and cooked and ate outside most nights.
The 'tourist settlement' is enormous - with some 200 campsites, 300 renovated appartments and some 300 unrenovated appartments. This was the downside for us... it was very crowded. But on the upside, the location was fabulous. We were across the harbour from Rovinj - a 15 min. ferry ride from the settlement to Rovinj which was fairly regular. The settlement was on the beach/coast so it was private 'beach'. So long as you didn't mind the rocks (which for us was fun for our daughter to play and explore the rock pools), you had about 1km of private 'beach' access. Another plus for us was the entertainment. The 'kids club' was in the morning, and again in the afternoon, and there was a 'mini-disco' in the evening after dinner. We were out most days exploring, so our daughter enjoyed the mini-disco each night. She loved it. The staff were all very accomodating and kind.
Also - a great tip. We took our small portable BBQ - and cooked outside on our terrace most nights.
I'm not sure if we'd go there again... basically for the reason that we were paying for alot of activites/features that we just didn't use and because it was so busy and large. But on the other hand - when you take into account the modern apartment with airconditioning, right on the ocean with private coast and regular ferry access to Rovinj - maybe we would do it again...