Highly recommended!
The pictures accurately represent this beautiful apartment; if anything, they don't give the full impression of the size of the apartment, the basilica view from the front windows is outstanding, and the location could not be more ideal for easy walks to the beach (2 blocks away) or through the old town (outside the front door).
The hosts are friendly and easy to work with; they made check-in and check-out easy and left us a nice bottle of Rioja to enjoy! Álvaro also provided us with many great restaurant suggestions, most which were only a few minutes walk from the apartment.
The apartment has 3 large bedrooms (one has a built-in AC/heating unit) with comfortable beds that can accommodate 6 adults, and 2 full bathrooms, one with a full bathtub/shower and one having a small shower stall. Each bedroom also has a desk which was convenient. The kitchen is well-stocked with everything needed (glasses, plates, flatware, pans etc.) and there are cleaning products and various spices/sugar/salt etc in well-stocked cabinets so you don't have to run out and purchase all these items immediately upon arrival, which we appreciated. The dining table seats 6, and the sitting/TV room (also having a built-in AC/heating unit) has two comfortable couches and a TV that provides cable tv and Netflix.
When you don't want to cook for yourself, within short walks there are many, many good restaurants, most which offer budget-friendly "menu del dia" options that provide 2 or 3 course meals for under 15 euros.
While the views from the apartment are wonderful, the apartment receives little direct sunlight. This translates to little warming affect from the sun, which is likely beneficial in the summer months but leaves the apartment cooler in the winter months (we stayed in February), especially in the morning. There are space heaters provided, however, so it is possible to warm the rooms not having the built-in AC/heating units.
Negatives? Not many! Keep in mind the basilica church bells (and the bells from the town hall down the street) ring every 15 minutes, though only from 9AM-10PM. And, being in the heart of the city, there is some street-noise and lighter sleepers may want to have ear-plugs available: Alicante is a clean city but the street-cleaning trucks start early, and the lively Friday and Saturday night people-traffic can be heard through the early morning.