Congrats!
We picked up ours in early June, and same, an 18.58-2 OB, and from Caravanland in Maddington.
To be honest, the handover was a bit of a blur - functionality of everything is demonstrated, with warnings about what to do and not to do to keep the gear in good shape. There was way too much to digest in the 2 hours allocated to the handover, and it became an exercise in trying to absorb as much as possible on where everything is and how to operate it. So we were still re-discovering things after our second 4-day trip out. So far we haven't damaged anything by misuse.
After you've picked it up, you'll find the Jayco user manual and video next to useless. The product manuals - fridge,a/c, tv etc are better, but there is a lot of gear and installation (tanks, water retic, waste retic, electrical, etc) which are not covered in detail by a manual. So understanding how everything works becomes an exercise in ferreting around inside and under the van to trace things.
If you haven't already, you'll be asked to sign an order form with everything in your order listed. That is the time to go through everything with a fine tooth comb and connect what you were quoted on paper, what you understood verbally, with what is going to be supplied to you. You will be very heavily discouraged from changing anything on that document once you sign it, so ask if you are not sure of anything.
We are out-of-towners, so on our trip to Perth included a shopping list of things we needed to buy for it at the same time. If you are in Perth, you should maybe hold off on that - the 10% discount at the Toyshop lasts for 12 months anyway. Just concentrate on the handover.
We have not found anything malfunctioning as yet, though we haven't given it much of a run on dirt yet either. There is a 12 month warranty for you to have things replaced if need be. We are planning a 2 week trip which includes several hundred k of dirt road, in Sept Oct, so suspecting that will reveal some things.
I had to have a 12pin rectangular socket fitted to my vehicle, plus a break controller. This all cost about $1000 which I was not expecting. The 12 pin system is basically a piggy-back arrangement of a normal 7 pin rectangular trailer plug, with 5 extra terminals on a second layer to take heavy ampage stuff. After much mucking about in phone calls between my auto-electrician and Caravanland, it turns out that only terminals 9 and 10 only are used in this second layer- to run the fridge, the rest not connected. Two auto-electricians plus another Jayco Outback owner I ran into said that that setup is a bad idea. The plug is not built to take the current drawn by the fridge, and will heat and burn out sooner rather than later. Also, while the recommendation is for that circuit (9-10) to be connected directly to the battery, my sparky talked me into putting a relay in between, so that if I stop the vehicle and walk away for more than 20 mins without turning the fridge over to gas, I wont come back to a flat vehicle battery. Apparently the original wiring for these vans comprised a 7-pin plug to do all the trailer and brake stuff, and a separate Anderson plug for the fridge circuit. After taking delivery of it from Jayco in Vic, Caravanland won't change the setup back to that, and you can't take delivery if you don't have a corresponding 12 pin socket fitted to the vehicle. I'll be replacing mine with a 7 pin plus Anderson plug set up after warranty runs out - don't fancy having to deal with that when we really are out back.
Long term we are fitting it up for a 12 month tour around next June, including a month at each end on the Gibb River road. Still gathering info on what is needed for that.
Hope that all helps. Have fun!
Linton