Green OS Ubuntu Alternative

I was intrigued by the recent appearance of yet another Ubuntu derived linux flavour, GreenOS or gOS which has got some publicity due to being installed on a few super cheap desktop PC’s being sold by Walmart in America.

My interest was in how efficient this would be on older or lower spec hardware, its claimed main advantage and whether I could install it on some of the computers that I refurbish where I currently install Ubuntu variants anyway.