...if you have Lightroom 6 or CC, you can create HDR images right within Lightroom itself, without having to buy a plug-in. There are several advantages to using Lightroom for your HDR conversions:
Hits all the points for me. Easy to understand, and emphasizes that you can do this without spending any more money for plug-ins.
More to the point, Adobe in particular is winning where Apple is failing. More on that in another post coming up.