Not friendly. Always keep an eyes on you. No heat most of the time. You need to monitor your radiator in the morning and in the evening - cannot over 20 degree and huminity cannot over 80%. When too huminity over 80% you have to turn up the rdiator but the temper will over 20 degree. So one have to monitor it from the morning 6:30am for the heater is turned on until 8:30am. If you do not do a good job Nick will make a very bad remark.