Just finished my first Dell TechDirect self-help dispatch ticket.
Had to replace a motherboard on an in-warranty Latitude 5490. With Dell TechDirect, I was able to login to a portal, create a ticket with a brief description of the issue and troubleshooting steps, then select the part I needed. A few days later, the board arrived, with a return shipping label for the defective board. Very slick. Didn't have to call Dell or talk to a single tech rep, it was awesome!
Plus, you get access to resources like assembly/disassembly manuals.