I have to admit that I never heard of ELK since I was always seeing Napco, Ademco, DCS, DMP, GE etc. Once I saw an ELK and got to experiment with it I ripped out a fairly recently installed system (will remain nameless) and put an M1 in. Even though it wasnt as inexpensive as what I had I am glad I did. You get what you pay for as they say.
Its definitely not as well known or as readily available as other brands and is not really marketed to the consumer yet but I think that day will come. The M1 is not for your average home, although the EZ8 is in my opinion. I think that as more people see the ELK products in friends houses etc they may want to change over the next time there contract expires with their present alarm company etc. Nobody really markets an alarm panel it seems. The CS companies market themselves and offer whatever product they have at the time (ADT, BRINKs Etc dont make their own systems). The ELK units would make excellent retrofit panels for people who want to go to the next level in security or automation.
Anyway I plan on signing up for ethernet monitoring CS in a few weeks. Found one for $ 8.95 a month I want to give a try. Since the ELK emails me anyway even if the CS messes up I will know about anything going on.