There are many folks on this board who have an Arctic and are very happy with it.
Music to my ears.
As far as energy efficiency, among the top brands, even though they all claim to be the most efficient, there's no solid proof that one is better than the other, and it seems that the quality makers all have similar energy efficiencies.
As to the absence of solid proof, I beg to differ.
I expect that it will be good news for consumers when government energy agencies (it's the Office of Energy Efficiency here, a branch of National Resources Canada) do energy efficiency testing and implement EnerGuide labelling and Energy Star compliance for hot tubs.