How Long Since You've Pumped Your Septic Tank?

Have you ever had your septic tank pumped out? Experts recommend it be done every 5 years depending on the number of occupants of your home. Our homes are now 10 years old, so even with only two-person occupancy, it is a good idea to do it soon. Sludge builds up over time and can flow and clog the leach field, requiring very costly replacement of the leach field. I've recently received estimates for pumping from Sweet Septic for $400 plus another $350 to locate and dig down to the tank from a separate contractor. Has anyone else done this and gotten a better deal?