The absolute worst company for service you will have the displeasure of being involved with.
Do not order seasonal, time sensitive or promotional materials from them, as they will be very late, the general standard for their delivery anyway, which is ridiculous considering how much their delivery costs. But if they have out of stock items they will send you the wrong, but similar product, to secure your money and then demand you fill out their ridiculous returns forms (which they send incomplete and missing everything you need) if you have the cheek to point out their errors. Worst service you will ever receive. I was mugged once, which was an altogether more pleasing experience than dealing with Zavvi.