Great hotel! We've stayed at La Concha, Los Arcos and Hotel Marina and Hotel Marina is definitely our favorite.
Nice service, comfortable, well-appointed rooms. The location is fabulous with terrific views of the marina, proximity to some very nice restaurants (try the La Baguette Francaise on the dock for a great cup of coffee and yummy cinnamom rolls) and is sheltered from the sometimes quite blowy afternoon wind. You'll also get a chance to meet some iguanas close up (they're sprawled out in cages next to the pool, near the exotic birds).