Aircast Airheel

Toro

http://www.physioroom.com/product/Aircast_Plantar_Fasciitis_AirHeel/2030/37985.html

I bought one of these with a strassburg sock the other week for plantar faciitis and I think it´s punctured already... i´m not sure though as I can´t remember how full it was before.  I have tried looking for a leak in water but not come up with much.

Does anyone have one and if so how full are the air bags? 

If not i´ll send it back it says 30 day money back.