It wasn't very difficult, but it took be almost 8 hours to complete. The biggest hurdle I had was I tore the gasket that goes between the turbo and brake, so I had to put everything back in the garage and find a dealer with the gasket in stock. I also tried to install the brake without pulling out the right front fenderwell, which didn't work.
It's easier with 2 people to get the brake installed on the turbo and the pipe lined back up. Otherwise, it's a 1 person job.