This is a very good app. I use it to remotely connect to my work iMac from my iPad Pro. It allows me to use professional software that is not available on the iPad Pro. I have also tried Microsoft Remote Desktop (to connect to my work Windows machine), and TeamViewer, and Screens. I think Parallels Access beats the others.
One bug bothers me: While keyboard shortcuts work pretty well in general, there is a minor bug if I use the Command key together with numbers on my iPad Pro SmartKeyboard. For example, if I type Cmd+1, it is mapped to Cmd+2. Please fix that!
danis77 about Parallels Access, v3.1.2