Good info.I have not seen much reliability issue with my Smartthings so far (I only have it for a couple of weeks). If the platform is unreliable, false alarm fees will likely kill any live monitoring systems.
The city when I am at charge false alarm fees ($125 each time), so even one false alarm is going to negate any potential financial benefit of using Smartthings.
Looking like SimpliSafe is the best value option to go for home security at this time but their hardware looks very dated. Will likely use that as the primary security system and ST as backup hobby like Eric did :).