Changed my PS fluid last weekend using the Audipages procedure - no issues to report. 3 litres of PS fluid required - you'll need a top up once you have flushed the reservoir twice, and a golf tee is essential! Genius device for blocking the reservoir up.
Otherwise watch your hose connections, and if you can - replace the OEM pipe clamps with some nice new ones. I did the one on the reservoir end as described, but also found the one the other end loose.