Had a leak on installation, had a gas leak a week later and had to call out gas board due to schoolboy error made!! Could have killed my family as it was noticed at 9pm, an hour later and I may not be writing this review!! Have had to top up water every month in boiler which means pressure is leaking somewhere and to top it up, should have had one year service 2 weeks ago and took the day off work, when I rang they said the engineer had finished a week earlier and they forgot to rearrange my appointment so I wasted a days annual leave and still waiting for Becky to call me back with a new appointment!!!! I think that covers my bad experience!!