Works well.

Works just fine with my Macs, Linux & Windows systems, no problems for me.

One reason I like this app is it will handle a connection with dual displays that include a 27" iMac Retina display and a 1920x1080 at the same time – something other iOS VNC apps have failed doing.

KayEssKay about RealVNC Viewer: Remote Desktop, v2.4.2