The luggage room is down the stairs from the main reception and is at the corner of a lounge with the scabbiest but most comfy sofas I've ever slobbed on.
You have to go to reception to borrow the key - watch out , its the biggest key in the world and you need a wheel barrow to convey it to the room. We were told its so nobody sticks in their pocket , forgets and walks off with it.
Take care what you put in the case e.g flight tickets, passports etc as it seems as though the key is given out to anyone who asks.
One tip re: Jet that we did not find out about until the last minute is that the complex has a courtesy shower block for use of the residents after they have checked out.
However, you need to book this in advance so its advisable to organise this the day before you will need it as the slots fill up quick.