My daughter, hubby and 2 kids, 9 & 5 did 3 months away in theirs last year. Perth to Darwin (including gibb river road), down the middle and back to Perth over 3 months.
Only issue on trip was a failed cheap circuit breaker and a loose crimped connection fixed by a auto elec in Catherine on a Friday arvo!.
They had no issues with the inflation system and left the annex attached. They did that by using thinner cushions to give more room on fold down .
Initially they had issues with opus getting a proper fitting annex. Apparently a batch of miss made ones.
