I'm 'over 200', and have the spring preloads backed most of the way off. Do have a fair bit of rebound dampening dialed in. With the springs set even at the 150 lb rider recommended levels, the bike is brutally harsh on anything but the smoothest roads. I have yet to bottom out travel font or back, with the small spring preloads I run. Maybe mine just happened to get the stoutest springs they had in the parts bin... Who knows?
All that being said, I would add in a few spring clicks to carry a passenger or ride it like a track day.