I have owned the Eccotemp 6.3 GPM Natural Gas Indoor Tankless Water Heater almost a year now. Bought it last year in March 2010. The additional cost to install it was breath taking, but over all in the long run it was worth it. The product is great, if you want to take a shower for 2 or 3 hours come out looking like a prune, you can do it with this water heater, it just keeps right on heating. Product is great, and overstock.com's price was good also. I have recommended this product to all my friends and family, and would recommend it to anyone wanting get rid of that old tank in the wall of a water heater that runs out of hot water in 20 minutes. Go with the Eccotemp 6.3 GPM Natural Gas Indoor Tankless Water Heater, you'll be glad you did.