I love the Strand. I just hate having to commit time to come here. I get so caught up in the many many titles, that I never spend less than 30 minutes in here even if I have only come in for one specific books. The deals are unbeatable unless you find someone who will give you books for free.
The staff knows what is what and where to find the exact book you need (do they have microchip inventories in their heads?).
This is the only store I have found where I can get a score of a show for $2. That is less than the photocopies would cost.