First and foremost, although Foundation had it's flaws, I have to give it five stars. The amount of influence this book and the series have had on science fiction is far-reaching and undeniable. As I was reading it for the first time, it at once felt familiar. This is probably because it has been ripped off so many times! That said, it wasn't the easiest book to read for a few reasons.
1. It was originally short stories which were later collected into novel form. This means that the scenes feel like they jump around a bit. Sometimes necessarily so (the series spans over millennia, so Asimov can't dwell too long on any particular area). 2. Because of the points mentioned above, it's hard to identify with some of the characters. In general, characters aren't given long to be developed because Asimov needs to move on to the next time period in the history of the Foundation. Just as you're starting to understand a character, their motivations and quirks, they are seldom mentioned again.
Despite this, when stepping back and taking a 10,000 foot view of the series, it's still quite an accomplishment and undeniably transformative for the genre. I have heard that the kindle version is a bit watered down compared to the original, but without a frame of reference it's hard to tell. I'm not a fan on censorship in any form, so it makes me want to seek out the originals as I continue the series.