It is rare to encounter a customer service that WOWs you ... So, when I did encounter one I decided to write about it.
I buy a lot of computer related technical books and have found that usually you get a better price at bookpool.com than others such as Amazon or BarnesAndNobles. They are usually quite trustworthy regarding ontime delivery but my last order, worth more than $100, made me wait for more than three weeks. As I didn't need these books urgently, I availed their free shipping service through US Postal Service. But the books didn't arrive within the stipulated 15 working days. So, I emailed them about it (BTW, this is the only customer service channel they have). Within few hours, I had a friendly response that they will investigate the earlier shipment and in the meanwhile, are making a new shipment through UPS one-day delivery.
Sure enough, I received all the books the very next day, delivered by UPS.