It looks great - and that's IMO the only reason to build it.
It doesn't work out for heating energy-wise and is not quite ideal for your health: http://www.green-trust.org/wordpress/2014/01/12/the-flower-pot-candle-heater-hoax-or-not/
Also, you could have saved on turning nuts onto the rod by building it from the inside out - i.e. start by screwing on the nuts from the end where the bottoms of the pots will be. And you can save one nut by using the two nuts around the chain ends plus two lock washers to create a lock point at the top end of the rod.