Has anyone had experience with heated floor tubing? A friend of mine said he bought Pex al pex 1/2 Watts brand tubing for his floor and said he bought it because the store he got it from only sells to contractors so it must be good quality. I looked up the price and it's $450 a roll of 1000' which compared to other brands I'm finding for $260 per roll but not watts brand seems like a big increase. Thoughts on if brand name really makes a difference in the tubing quality? Thanks