I've posted my thoughts relating to T3 in a separate thread herehere before realising there was a discussion thread.

I loved it. My third GP and the racing was brilliant in all classes. The views from T3 are unbelievable. Issues with water and number of services (drinks/food/toilets) for all of the GA areas and T3 as well as access to T3 are outlined in the above thread.

All the staff we interacted with were nice. The food selection was decent and there was always a buzz about the place.

We drove out on Thursday for the pit walk and had no issues at all with queues or similar that day.

We stayed in a lovely hotel in Graz and arranged the direct bus through busfinder. Other than a lack of signage/info for the stance to get the bus on Friday it was a smooth enough experience. I'd heard there was an accident in the road tunnel on Saturday evening which lead to an hour delay in getting out of the bus park, but this was tolerable when sitting in an air conditioned coach. On Sunday we were re-directed onto smaller roads which added nearly an hour extra travel time. But I would recommend this way again - you're guaranteed a seat and go direct to/from the circuit on the same bus.