This is a pretty good game and I'd like to think that I'm unbiased since I never played FNAF. If you play on hard or get the dynamic difficulty high enough the game keeps you constantly occupied with your butthole clenched and pp happy. The animations are very nice and so are the models. I always thought that the only good way to have a hentai game with male protag is either battle fuck or where the player is being hunted: hide and seek, run or rape or this, whatever this is.
Out of the bots I think poor Chica is the easiest to handle, she takes forever to "start", is very easily handled and even when she sneaks into your office she doesn't do anything unless you look right, so she's only a threat when Frederica is coming at you.
The only major gripe I have with the game is that the other kind of "fun" (wink, wink) happens only when you lose, it's outside of gameplay. Ideally you want to have the sex and gameplay intertwined, here you only get to sex if you lost.