Service good, but I wouldn't recommend a Dell.
The actually service at Dell I don't have a problem with. The ordering and customisation of the laptops is easy and you can get exactly what you want. My laptop came when it was supposed to with no problems. The reason for the moderate rating is that I wouldn't advise anyone to get a Dell. I've had mine for just over a year and they're not as great as I thought, definitely not worth the price you pay. The battery and charger both wore out very quickly and needed replacing, and Dell's own replacements are outrageously priced.