yes, I also have a 8' Simmons (and a 6'10" Simmons prototype coming in the next months I hope), and they are extra fun but different: you kind of pilot an extra fast and smooth glider, whereas a modern design feel more like an acrobatic, high-power stunt plane. Simmons are best on open face fast waves, even fat (not hollow) and can surf suprizingly well non-breaking waves, but you will found you need them to gather speed first for one second before being operational.
Sub-7' are quite slow to paddle, so they may be too big a hassle if you have rips, or hard-to-go-out conditions (closely spaced bars of powerful whitewater), or shifting peaks (it is hard to scramble to catch big sets breaking 50 meters out) . Otherwise, they are the best to "milk" small & fickle beachbreak waves
I paddle with parallel feet most of the time, only go "fencing" on take off & going through whitewater, or just moving the rear foot 1/2' back in chop for stability. I cannot manage the "world cup" shapes (ultra narrow and water to your ankles). You can see take offs on these non-Simmons 6'8"s in these vids, in "lake" (mediterranean, short period) waves.
(well the above one was in Biarritz, but in crappy conditions... so crappy I was alone in the water in this Surf City)