I used this BBQ for the first time yesterday, Sunday Easter. 
I think it is brilliant, much better than a classical round BBQ because I was able to control the internal heating by moving the charcoal tray up or down. I have used a smoker box too. I just had to work out how to use the vents.
I cooked a lamb leg and I was able to place an aluminium baking tray next to the charcoal to collect the juices of the lamb.
Mission accomplished.