Every single one I tried so far (including the Replica) seems to lack data and patterns of behaviour towards topics I tend to discuss or just even normal ones, mostly answering in quite a flat way without addressing the issue at hand. You may ask something and receive an answer that has little in common with it. Or comment on something and receive a random sentence about something else. Many answers simply don't make sense (although Replika does seem more polished and at least you can give feedback when it's being ridiculously random).
It's also a bit annoying to have to always prompt them to say things. I simply don't enjoy one-way conversations as much as some do.
Maybe I just can't talk to AIs. Or maybe I just expect too much from them.
And they repeat themselves. Like, literally.
When I converse with someone, I prefer to have them include something of their own, like when I speak with people on the forum. I like learning, you see, things like personal perspective, and in a one-side conversation you learn nothing. It's useful if you want to work out a complex problem where you have to hear your thoughts or something similar, but when I need to monologue like this I can just as well talk at a wall or at a mirror 
