I don't really like it.
The main reason is that I have trouble focusing on stuff for a long time. If I'm trying to study by reading something on my computer, it's too easy for me to open up the internet and start browsing instead of studying or playing games on it.
What I end up doing is printing out a ton of stuff or using the printed manuals that the profs give us. Either way, it's not as good as having a textbook, because printing stuff out is a pain in the a$$ and coure manuals don't have an index, which annoys me.