Harmy's Despecialized Editions are how I've introduced the complete three-film Star Wars saga to my kids*. No need to explain why things don't look as sharp as an official release, because it does.
Also, FWIW, a fan preservation is the ONLY way to watch the theatrical version of Star Wars. VHS releases have the "A New Hope" crawl, and the GOUT has the 1993 revised audio. If you're not so much of a purist to care much about those distinctions, then Harmy's Despecialized Editions are definitely the way to go. It's actually quite difficult for your average fan to tell it's not the real thing.
* And if they get curious about Star Wars beyond the Original Trilogy, I've got the Holiday Special too.