It's been almost 20 years since I read the book (I bought a copy from Barnes & Noble that has those pretty, old school looking covers). I found it quite interesting since it was different than most of the Frankenstein stories that I had seen in movies and on tv.
Yep, I've read the Project Gutenberg edition (as well as a gamebook adaptation), and watched a modern film version, probably from the 1990s. Differences make all of them interesting.