Should I install a burglar alarm system myself?

I’ve seen wireless kits, but I’m not sure whether I should pay for a professional systemEvery week a Guardian Money reader submits a question, and it’s up to you to help him or her out – a selection of the best answers will appear in next Saturday’s paper.One of our neighbours was burgled last week, so we’re keen to get an alarm. I’ve seen wireless alarm systems online that you can install yourself. Do they really work, or is it better to pay for a profe