I had the same experience when switching from my Terry Falcon to a Specialized Oura. There was immediate relief from soft tissue pain, and a very long adjustment period for my sit bones. I mean very long. Occasionally, I still feel it on my left side, where I have a tendency to lean. But, it's worth it.
The male LBS owner warned me and told me it would take at least 6 30+ mile rides for me to get used to it. He was right.