I have had 2x RR Sports, great when they work. My first one was in the shop so much it was Lemon'd, and we don't have Lemon laws so that shows how bad it was.!!
LR replaced it with a new car which was much better. But as soon as the warranty ran out it was time to move on.
The air suspension, electrics, turbo pipes, alternators and batteries can be a nightmare on the RRS and the LR4.