All I've done so far is the 2 pieces of the centre console, the bit round the gear knob was easy, I had to take it apart to fit a new gaiter anyway, just some real stretching round the curves. I'm not happy with the top bit, quite tricky and I messed it up a bit round the gauges still enough left to have another try though! I want to do the silver bits on the steering wheel but I'm not sure how they come off...
I guess it's a pretty reversable mod inside or out, I wasn't sure on the interior at first but it's grown on me, apart from the bits I stuffed up!