I just have regular FS trimmers, but I have the pole pruner, articulating hedge trimmer, straight edger and power sweeper. The last doesn't get used all the time, but when I need it, it is one of the best tools I have ever owned. I smile every time I use it. Plus, by pulling a hairpin at each end, I can pop off the rubber paddles, and install the sweeper bristles, or the tiller, and a couple other things off the yard boss system attachments- all on the one gear box that drives the power sweeper.
The straight edger stays on my FS90 most of the time, but I use the other stuff about an equally, which constitutes about 10% of the time.