Can hardly get the work done.

Let’s not talk about those cool features. There’s no point of talking about those if the basic work cannot be done correctly.
Being a VNC client, its most important thing I think is to support the most popular VNC server. Does it support? Nope. It won’t connect to RealVNC server. I raised this problem in my previous review months (if not years) ago, but it’s still not fixed. Workaround? Yes. Change RFB protocol on the server side to 4.1, then Screens can connect to RealVNC server.
Ok, so now you can connect (after quite a bit trial and error), but wait a minute, the screen doesn’t look correct. I have a number of virtual machines at home and I have VMWare set up with VNC access. I’m seeing color blocks in virtual machines. Well, it is true I’m not seeing on a connection provided by RealVNC, I still blame Screens because “Screen Sharing” and RealVNC viewer are able to handle the rendering correctly.

BrandonChang89 about Screens VNC - Remote Access To Your Computer