I parked my motorbike with these guys for a few days. It worked out way cheaper to do this, and for them to take me to the airport and collect me, than it would have to catch a taxi.

The online booking system worked smoothly and I felt relaxed that my bike was going to be looked after and that I was going to get to the airport on time.

The bus driver was very cheery for that time of the morning, which was a great start to the day.

Easy to book ahead online, just turn up an hour before your flight, you wait in their comfy lounge, then are shuttled to the airport less than 5 minutes away. They then meet your return flight, and return you to your car. They track all flights, so if your flight is running late (or early) they'll know about it.
You can choose to have your car parked either undercover, or out in the open in their secure, well fenced parking lot.
They also provide full servicing and detailing of your vehicle, including mechanical repairs, if you wish.
I've seen that you can even take your dog! They arrange to board it while you're gone and you collect him/her on your arrival back.
I had to extend my stay an extra night at short notice, and it was no problem.
I paid $50 for 4 nights, which was cheaper than I used to pay when using the valet parking at the actual airport.
Would very happily use them again, they provided a great service.

I've used these guys several times now when I've travelled interstate and never had an issues. Their website enables easy booking of your parking, and confirmation email generally arrives within 24 hours of booking.

They offer a shuttle service from the carpark direct to and from the airport terminal no matter how early or late your flights are. Even when you're flights are delayed, they are keeping in contact with the airlines to ensure they are on time and there to meet you when required.

As well as secure parking they offer a number of other services including car detailing (they always do a very good job) and automotive servicing (not a service I've used at this stage).

I use them regularly because their pricing is around the same (or less) than I would pay in taxi fares and I get the car cleaned to boot.