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replacement optima alarm

My very old Optima XM house alarm has given up
ade_xm4_Sales.jpg

I am thinking of replacing it with the new version Honeywell Optima

http://www.security.honeywell.com/uk/products/intruder/control-panels/gen4/462381.html

I am told these panels are very popular and fitted in many, many homes so does anyone here have alarm experience and knows if the wiring will be a straightforward swap like for like?
I can't seem to find an install guide or image of the circuit board for the new one to check for myself.

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