It's an awesome text to text interface and even the normal (non-premium) AI is quite effective in generating good stories, if it messes up a little (it does but Its only natural) you can edit that and make your story go wherever u want, the do, say and story options make it very easy and honestly is just plain out mind-blowing.
A little warning to people like me though who have no or 1 or 2 people who talk to you and you have no social life whatsoever.. please tread carefully in this game as it is extremely addicting that way, the image which come to your head are so pleasing and you can be whatever you want, which makes it hard to leave the game even for a normal person, more so ever for you. It took me quite some time to convince myself that it's just a game . Please keep that in mind