Knapp is totally right that the prequels faded dramatically over time. How TFA fares remains to be seen. Personally, I do not feel that "go rent the 1977 movie" is an adequate reason to avoid a reboot, but understandably opinions vary.
To qualify my opinions, maybe I have a relatively low bar. Or am looking for different things. For example, I immensely enjoyed (and still do) the LOTR movies. It remains one of the top movie experiences of all time for me, and TFA vaults the new Star Wars trilogy squarely in contention. I know there are some serious critics of it, and I can get into the "what I would have liked to see" as well. But for me, it barely registers as a dent to my utter awe of the films.
It just works for me. Nothing works for everyone, but that's fine. There might be a better LOTR movie in the future and hey, a better take of Star Wars, too. But dangit, for my money this was pretty dang good. Best to date, all due respect to George Lucas.