The heater was delivered very promptly and its compact size is just what I want for my small lounge. The problem is that it only lights very intermittently. I followed the instructions for ignition very precisely, but if I hold the control knob down for the full 30 seconds the flame roars upwards and the panel doesn't ignite. If I hold it down for about 20 seconds the panel ignites, but then very often goes out as soon as I release the control knob (I hold it down after lighting for a while, as instructed). I have only lit it successfully a couple of times. I was told that the problem was with the gas cylinder, which was overfilled gas and the mix too rich. I phoned up Calor Gas, couldn't reach a human being, but was redirected by a recorded voice to a Calor Gas provider near me. However, they hadn't heard of overfilled cylinders, didn't know what to do about it and referred me back to the small shop where I bought the cylinder. They have already changed my gas cylinder once. Round in circles!