I used the grill only 3 times and found it nearly impossible to regulate the flow of propane.  It would not shut off completely which made using the grill a harrowing experience. The black knob and spring fell out completely at one point. I am hoping the replacement valve being sent to me fixes the issue.  I wonder why when the part is being sent direct from the company, it will still take 7-10 days for it to arrive.