Hi, I would stick to Ruckus, we have R600 in KS1 and R700 in KS2, we use about 200 ipads and never have a problem with Wifi. I have one Ruckus per 2 classrooms. The walls are thick Brick built walls and I have no wifi issues or 'blackspots'. I used a company called NetworkIT24, they are very good and provided the most competitive quote without compromising on quality. IF you need any more details then give me a shout as I would highly recommend them.