I went in February 2013 and the tour was great. There's so much to see, it's very helpful to have someone guiding you through and sharing interesting stories about the history and artwork. Our guide was very knowledgeable and friendly and made the tour fantastic.
This was the perfect way to see the Alhambra and get a glimpse of Granada. The local guide at the palace and garden was very knowledgeable and interesting. Finding lunch was a little challenging (more direction from the guide would be appreciated). A lot of walking - be prepared.