The library website for our capital city area started offering eBooks in July this year. The collection is still quite small and seems to include only non-fiction books at the moment.
I like the idea though. Of course, I wouldn’t read a 400-500-page Stephen King on the computer screen but for example the CSS guide I test-borrowed works better than well as an eBook. (It is a silly beginner’s book but I just wanted to glance through it quickly.)
A downside is that there (currently) is no way to book an eBook (ha ha). The loan periods are 1 day and 7 days (I think I saw 3 days, too) and you see how long a loan lasts, but because the book can be returned before the loan period is over there is no way to anticipate when a book might be available. And often someone snatches it first. That happened with the CSS book. Every time I went to check, the book was loaned for 5 more days or 2 more days. With books that have more than one copy available this isn’t much of a problem.
Can’t complain though, don’t really have a reason to either, because it’s all completely free (except for the electricity) and very convenient.