I don't think that's fair... Though I haven't paid attention to his current lineup (I bought his first version released) I've been very pleased with his product. Actually, I just checked and my version is still for sale for $45 and it really covers everything the Elk does (security, lights, hvac, outputs)... The optional items are multiple M1's, ip video, energy module, and ip video. The $99 pro version adds everything... There are no add ons. Jayson (the developer) works very closely with Elk and has written an awesome app. I think the reason there's only one is because it would be hard to improve on and keep competitive.
Wilson, it sounds to me like you're pretty biased towards the HAI... But does the M1 *not* integrate well with the nuvo? What would HAI do that Elk doesn't? I just want to see if there are tangible facts behind your preference or just personal opinion?