Searching is easy, there's not much info on titles, but product availability and delivery times are clear and the stock seems pretty expansive. Although BOL stresses the pleasures of reading, this site also sells music, videos and has a Gifts section. Generally it's clear and is faster than it used to be. Book selection is fine, although not as good on US titles as Amazon. You can order unlimited books and only pay one delivery charge of 2.95.
Delivery takes around two to three days.
Alphabet Street Useful British effort that shouldn't be overlooked in favour of better-known names. The site design is a little busy but navigation is good and titles are easy to find. There are no headline grabbing giveaways and not much content. However, various loyalty schemes are up and running. It's free and pretty quick too.