Bought a set of Filter Queen filters from them. I've had this vacuum for over 15 years, and the filters I bought make it run like brand new. Nice people to deal with - they have become my go-to place for parts.
Great service, I actually prefer FS's commission system as you get employees that actively want to help you. As long as you know what you're looking for and want, you should be fine. Usually able to get a discount if you talk to them.