Youri is a nice host! He gave had a fast reply on questions and was very good at informing everything we asked about.
The house is well situated, close to the Cote de Basques (maybe 8-10 min walk caus of the hight and stairs) and a little bit further to Grand Plage (maybe 15 min walk). The house is well equipped with a good kitchen if you want to cook for your own. The house is pretty high, 4 floors on the entrance there is some hangout are and the kitchen and the kitchen table. The "hang out area" with is not big enough for 8 people but since you are mostly outside we didn't find this as a problem. There is good room for 8 people at the kitchen table. There are no garden or something like that, only a small courtyard where you can put you boards and wetsuits (which is good of course).
The beds are good, some of them hard and some of the softer. We was 8 adults living in the house and the double beds was big enough to be 2 adults in.
I would definitely recommend renting the house! Youri is, as mentioned before, a good host! Biarritz is also a good place to be!