I have been a satisfied customer of Link alarms for 20 years and value their high level of expertise and excellent service. Link alarms fitted my alarm and I have a maintenance contract which costs me less than £4 a month and entitles me to a service each year. Excellent value! i appreciate the fact that Link alarms operate a 24 hour call out system. Two years ago I returned home after 10pm to find that my alarm would not switch off. I phoned the company and they came out immediately and replaced the key pad. I have no hesitation in recommending this company.