Got it done in approx 5 hours.  Removing the Cam adjuster bolt was the only butt clenching moment, but it cracked off nicely. 
The weird thing is it all looked fine!  I nearly didn't bother but then I thought feck it, I've bought the bits so why not.
I was impressed by the condition of my engine at 100K.  It's a BYD lump.  It's clearly been looked after before I bought it and I change the oil every 5K with Mobil 1 ESP 5W/30. 
Barely any staining at all and the tensioner is hardly touched either.

Although mine wasn't mega noisy at idle, I'm glad I did it as there's a fair bit of chain droop at TDC compared to a new chain.

New chain and the droop is a lot less.  Car is quieter at idle now which is a bonus.  I caught it early I think!

Those running a Loba HPFP, you might wanna change your follower more frequently than usual.  It's starting to go after only 20K miles.  Must be the stronger spring in the pump I reckon?

The only 2 things I'd recommend, based on my experience, is use the VW tools and torque wrench or a very rigid breaker bar to remove the cam adjuster bolt, otherwise it's all straight forward. Add a vacuum pump O ring to the parts list as well because it's a lot easier with that out of the way.