I took a half-day refresher course and was taught by master diver Lyndsay. It was excellent. Very thorough in his review of my (dubious) knowledge levels and spent time in running through and reteaching the necessary skills correctly. A tough but top-class teacher!
Refresher courses are a necessity for infrequent Open Padi divers, and it's nice to actually get some real value and teachings out of this extra cost. I would highly recommend him and the centre.
They're also a really nice bunch of guys!