We booked a renovated room with a view to the garden and the swimming pool. I disagree with previous comments about the birds under the glass ceiling : there were none when you stayed early November. The hotel is well constructed though needs some restoration here and there. The swimming pool and garden area is very spacious and gives direct access to the beach where 2 sides separate the families with children from the couples.
We booked room and breakfast only. I can write about breakfast at the Ceramique restaurant : very large choice and sitting on the outside terrace. We ate twice at the Italian restaurant and were very satisfied. I have a mixed opinion on the Andalucia restaurant : limit your choice there to the mezze.
If you have the opportunity, go to the Casino of Djerba ( 7 minutes by cab) and eat at their restaurant on the first floor.
The director of the Radisson Blu hotel Mr. M.G. was very present and chatted with clients. The personnel of the hotel was very friendly.
last but not least : do not miss their great spa.