I am a little lost about the emotion of the replies here. I really don't understand the issue with having an hour with an Instructor every couple of years to keep things sharp. As an Instructor I do 2 or 3 a week of these and everyone who does them think they are great value.
I do my ME/IR renewal every year and that gives me my hour or so with an Instructor as a flight test, always good value.
As a microlight pilot albeit with only around 300hrs the standard of airmanship often displayed by ML pilots will benefit from an hour with an Instructor. The comments about the hot ships is valid as well, ML pilots are flying increasingly faster and more capable aircraft, they should ensure that they are safe in the same way as the old 'slow' spam can drivers.