I don't have one, don't plan to. 800 bucks for an apex gold is absurdity in my book.
Just do it the old fashioned way, people have kept successful saltwater tanks since the 70s.
I agree somewhat, but anytime I go out of town for work or vacation, in the back of mind I wonder what is going on with my reef?
Is it overheating? did something die/ ORP values crashing? Did my house A/C quit? (happened before and wiped out this VVVV in 2008)
I travel maybe once a month for work for a few days, but i also go on 1-2 ~10 day dive trips a year. Being able to look at my my systems status while out of the country really eases my mind.