Smart Actions works alright most of the time.
I had it set for when it was midnight every night, and my phone was plugged in it would go to silent except for my vip callers.
There were countless times where I would plug my phone in and it would not activate, or when it was already plugged in and it became midnight it wouldn't activate
The only way to get it to work was to disable then re enable it. Very annoying.
So I stopped using it.
Tasker works very well once you can figure out to use it, but I haven't found a way to do a vip caller feature. There are a few other apps out there that do the same thing as smart Actions and work better, I just can't remember the name