My Extreme Q had a tumble during a session and unfortunately the heat cover smashed. I thought it was done for but then I discovered that you can order a replacement. These guys were the only ones that had stock at the time but they were very quick with delivery and the price was fair given the entire vaporizer was un-usable once the heat cover smashed. To replace the heat cover, you will need to disassemble the unit to replace the part properly. It is VERY easy to do so don't let that put you off. There is a great disassembly tutorial here that I used to fit the replacement >>> https://www.youtube.com/watch?v=jceH_1BPNpM
Would definitely consider buying from vaporizersdirect again. :)