A good timeline of the alterations for folks who don't know what the fuss is all about...
The 'Star Wars' Timeline of Changes [Infographic] ~ The Geek Twins
Picked-up 2 sets because they're available up here as a game trade-in at Best Buy's sister store (Future Shop). Will probably get a third as well because this will not be $44 for a long time.
Watched half the movies already. No complaints from me.
ANH + ESB: perfection.
TPM Yoda looks like he fits the prequels now. There are still things I did not see/realize before, like the speeder driver on Coruscant at the landing platform looks like he is a Bothan.
Listened to half-hour of each commentary. And there are 2 for each movie. Have not even watched the extras yet. This set is easily the best Blu-Ray release of the year.