First, I really appreciate the translation patch and walkthrough provided in this thread.
One of my favorite things in games in attention to detail, of which this game has quite a bit. I also appreciate that the devs have continued development on it for a while now, without charging as DLC or anything.
Sylvie is excellent. She's incredibly sweet, and I appreciate how demure she is until she loses hold of herself. Didn't realize I enjoyed ahegao until I played this game, heh.
There's a lot of incredibly specific niche-taste content (the kisekae stuff, for example), much of which is very much up my alley. Can't say it would be to everyone's tastes, unfortunately. The other main downside which comes to mind is that there is no proper good ending.
Still, Life With a Slave is easily the best eroge I've played. Excellent stuff!