The Mapex T755A is comfortable.
But, the actual padded seat part that attaches to the stem just wouldn't stop coming loose.
After re tightening the wing-nut in 20 seconds of playing i could tilt the seat a good 10mm from side to side.
I just wanted a really ridged seat.
I exchanged it for a Pearl D-790 from Andertons. Not any unwanted movement at all.
Andertons customer service is 5 star. Very happy with the Pearl and Andertons.
The Mapex is a good seat, but just not for me.