Once you have installed the application and run it for the first time, a tutorial opens to show you how to use it. You will find the first few plans will take a while as you are getting used to the system. However once you have done a few, it will only take minutes to create quite comlpex floor plans. I did a reasonable 5 bed house yesterday, and it took about 15 mins. That includes all doors, windows, cupboards, kitchen units, bathrooms, boiler, HWC etc. etc.
I no longer hand draw my EPC floorplans, I use their DEA floor plans, as I find it easier and certainly more accurate.