This is a very good fire pit. The 40,000 BTU's is a perfect amount of heat. BUT I don't recommend using glass over the burner. I filled the whole bowl with glass from LOWES because we didn't want the lava rock look. When I did this fire would start up no problem but then the flame would arbitrarily cut out. I suspect that the safety valve kicked in because there may not have been enough air for the burner to work. It was very intermittent. Sometimes the flame would cut out after 5 minutes and then after 10 minutes or after 2 minutes. I finally figured out that it was the glass over the burner that was causing the flame to go out. So I kept the glass on the perimeter of the burner and put the lava rocks over the burner area so now there is a combination of lava rock and glass, see picture. Now it works great and no issues with the flame going out. A different glass might work but the one I used definitely made the flame go out.