[The Munster]

Here at Easter-time in the UK, we are bombarded with D-I-Y commercials on the gogglebox. One of them is advertising 'paint runner' [easy paint system] with all the gathered 'members of the public' nodding their collective heads and telling us how great this paint runner is .. best invention since the wheel blah blah blah so was wondering if anybody here has used it and if so .. good, bad, indifferent ?