My sister in law lives in a property that has a bells only system installed by Mr Joe Sparkie.
She has recently renewed her home insurance and,as before,mentioned the alarm system to see if she could get the premium reduced.
As above,because it wasn't monitored and not installed by an improved company there would be no reduction due and has on her policy (as before) no approved alarm system installed,with no mention of that which is fitted.
I think the OP here only came on to say that they found the YALE product suited their client base and was happy to continue with it.I don't think he/she expected a full on trade debate on what is the public forum of the site.