Wisdom v HKC Alarm

Hi

I hope to get wireless system installed in old house so wired is not an option as not all wondows seal correctly

I can get a Wisdom system installed for 1000 or a HKC for 1400. I understand installers charge more but is the price difference worth it

I would pay 400 if worth it as do not want any alarm issue ie false alarms etc as person using the house is elderly

Thanks
Noel