So far, amazingly (considering the reliability ratings on LR's), the biggest thing that went wrong was the wiring harness for the hydraulic suspension. It was about a 600-700 dollar repair out of warranty.
2 other minor things are the black plastic panel on the bottom of the driver's side front door came loose. No big deal, though, I ripped the rest out and bought new plastic clips from the dealer and put it back on in 15 minutes.
The other thing was a piece that goes on the back part of the door handle. It broke off (although it was already loose from the previous owner) and still needs to be replaced.
I thought that the LR3 was one of the best looking SUV's on the market today. Tough, rugged, roomy as hell, utilitarian.
I also thought that it was going to be a maintenance nightmare, but turned out to be otherwise. We must have gotten a good one, but other than the above listed items, the car has been great. Repairs are relatively expensive at the dealer, but I would recommend finding someone who has worked on Land Rover's for a while and will do the labor cheaper. I believe in using the manufacturer's parts in about 95% of the circumstances, but when a Joe's Land Rover Repair is going to do the same labor for 75-80 bucks in labor as opposed to 140 dollars in labor, I'll take the parts from Land Rover over to Joe. Front brakes (complete set) ran about $430 - not too much over any other large SUV.
As far as the ratings are concerned, 7/10 performance because 300 HP is a little low for a monster of this size, but it can get out of its own way.
8/10 on reliability for the reasons explained above.
9/10 on comfort because I have taken so many 1500 mile trips in that car and for a 6'1" 200lb man, it's very comfortable; the only reason it didn't get 10/10 is because I have felt softer leather on more plush seats.
6/10 on dealer service because they take their sweat F*&%ing time to do anything. 3 hour oil changes, etc.
7/10 on running cost because I would take it to Joe's and bring LR parts. Plus, it really hasn't cost us more than any other SUV would cost us.