I absolutely HATED my suspension seatpost. I never knew where the seat was. For example, because I am also a big guy, I had the preload set to max. I had to adjust the seat height way high (unsprung) so when I was sitting on the bike it was in the proper position for correct leg extension. If I was descending a hill or a steep chute where I needed to get my weight back over the back of the saddle, the saddle would rise up back to the unsprung position and it made me very uncomfortable. When I would complete the descent and move forward again, the saddle would snag my shorts or I had to make a conscious effort to rise my buttocks to avoid the saddle.
It just made my riding experience a hassle, not a pleasure.
Just my experience!
L8R
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"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger