Simularly for Sonnet EM software - in about 30mins from first run you can simulate a coupler if you're used to *any* other EM SW, because the UI is standard Windows - File, Edit, Tools, right click to do 'something' with a selected object, etc. AWR has quite a different 'concept' to ADS (the "display" section determines simulation parameters) but it's just logical, because most of the rest of the UI is standard. As a long time but sporadic Agilent ADS (and EEsof before that) user - I was able to set up a non-linear GaAs simulation in AWR in about an hour after installing the software, without a manual. For Eagle I had to google every single operation - ten times - because it's so uninuitive to anyone 'trained in the art'. Guess why I didn't buy Eagle when I was considering standardising on Schematic tool? Having used Zuken CR-5000, Zuken Cadstar, Novarm Diptrace and Mentor Graphics BoardStation, all of the latter have a reasonable UI (ok, BoardStation sucks, but it's very legacy). I hope this doesn't come across as a tirade as I use LTspice for work on a regular basis and regularly expound its virtues to other EEs. Having a 3 icon UI might look simple - but with with five modifier keys, and default shortcuts like 'F6' for copy (Ctrl+C is the de facto standard, for anyone post WordStar era), is no better for the beginner, and equally frustrating for the regular user who neither benefits from the 'simplification' nor lives in LTspice all day to get used to its quirks. RTFM is only a partial solution - menu items (possibly greyed out), with the *option* of keyboard shortcuts is, I think, a much better solution. The poor discoverability of both touch interfaces and excessive reliance on contextual menus has been documented.
Moreover, menus and words are *good* - unlike icons which are very hard to do well (and impossible to search for on the internet). I respect the enormous amount of work that has been done on LTspice (and here comes the 'but') Shortcut keys are vital, yes, but the defaults in LTspice are not intuitive (and I use 3 schematic CAD packages, and 3 other simulators) for different projects at work - so mapping keys is very important for me.