My mom had 2 Filter Queens and I have also owned a Filter Queen. Emptying the dirt container is really not that big of a deal. And the paper cone only needs to be changed when the dirt container is emptied, which for my use (even with 2 cats that shed), was only once every 2-3 months. For vacuuming normal household dirt, the cone does not need to be changed every week. For me, the Filter Queen was more convenient than the Rainbow (I have owned the current model and also currenlty own a model D). If you want to do a quick vacuum of the kitchen floor for instance, setting up the Rainbow is a lot more hassle than the Filter Queen which is always ready to go. Say, for example that you drop a glass and it shatters into thousands of slivered size pieces. With the Rainbow you would have to fill up the water basin, attach it to the unit, vacuum and then dump and clean the bin. With the Filter Queen you just turn on, vacuum and turn off - too much hassle for a quick vacuum in my opinion.
Gary