Great hotel in the historical center of Valencia. Our room had an amazing view over the Placa de Santa Caterina Street as well as Torre de Santa Catalina.
The room had a small, beautiful balcony where one could enjoy the view and feel the atmosphere of the city at any point of the day.
Valencia Cathedral is less than 5 walking distance from the hotel and there are also plenty of great restaurants as this is really the heart of the city.
The only downside was that currently there is some construction work done at Placa de la Reina and one could hear the noise in the morning if they keep the windows open. However, this did not impact our experience, as construction work would finish relatively early in the afternoon. The room also has air conditioning.
The staff was extremely nice and helpful: they allowed us to leave the luggage at the reception when we arrived before check in time. On the leaving day, we were able to leave the luggage at the reception after check out, and we were still able to enjoy a day in Valencia as our flight was in the evening. We were also given free bottles of water, tea and coffee and new toiletries every day.
You can use the public transport to reach the beach (Platja del Cabanyal) in less than 45 mins.
Overall, I highly recommend Hotel El Siglo, in particular if you care about quality/price and location.