[MLB007]

Yes, I used the smart posture seat system and at first i didn't like the position. But i tried it for a while and I am starting to really like it. The seat seems to be more comfortable when using the suggested smart posture. I noticed that the bottom is still a bit hard, but it doesn't hurt as much as before - however, I think maybe I am either breaking it in more, or getting used to it?

minimizing pressure points is part of the whole smart posture thing. Getting you curled up more takes pressure off the tailbone. I didn't like it at first but after a couple of hours in my "normal" seat position my butt was hurting and I tried it and found it much more comfortable for the remaining 1.5 hrs. Fwiw

 

[MLB007]

Gotta love a "luxury" car with uncomfortable seats.
Welcome to Genesis.

 

[MLB007]

That's my problem, I am by no means thin, but I have no ass. I don't know what happened to it, but it is just not there. It is hard to keep my pants up.

Couple of different causes. Most common having a gut leading to a pelvic tilt to balance when standing. Leading to a sublimation of the gluteals to the hamstrings. because the angle is changed from the pelvic tilt you (can) start using your hamstrings to do work that your glutes are meant to do. Muscles not getting worked atrophy and go away. Can't keep pants up and cramps in the hamstrings (range of motion is too extreme) = that be the cause.
Glutes should be the biggest and strongest muscle in your body. Not good when they aren't.
Lots of youtube videos on the subject and activating dormant glutes. Educate.