I visited Wok Riosur in December 2014 with my girlfriend and during our week stay we visited 5 times for the buffet. It was fantastic we both loved it and we couldn't wait to come back and revisit. Unfortunately on the occasion things had changed there wasn't as much food on offer for the buffet as on our previous visit. I asked the waitress why things had changed and she explained the Spanish didn't have as much money nowadays so they lowered there prices and variety for the buffet. We left that evening a little disappointed.
After a couple of days I decided that we should re-visit but this time try the menu del dia 3 courses for 5 euros or thereabouts. We had soup starter with a roll and butter followed by chicken curry then ice cream and it also included a drink we both had cokes, nice out of a glass bottle. Fantastic Rio sur had redeemed itself in my eyes.
However we visited again we were served one roll with our soup and told that the other one was in the oven of which we didn't receive. They must have forgot about it. Sorry Rio sur service has dropped staff were to busy cleaning the backs of chairs and not attending to customers. It's a shame as the place we loved now is no longer. I doubt if we will revisit again shame really as this was our favourite place in Tenerife. It would be nice if service could become better.