I can attest to the fact that it is difficult and scary to get into the tub of the Mariner. I was on it a month before I had my left hip joint replaced this summer. It was really hard for me to bend my left hip enough to get into or out of the tub, but I managed okay. But it was also sort of scary - I was so afraid I would slip and fall.
I would prefer the walk in shower. We have one at home and I love it.
Can't wait to have one on the Voyager next summer.
Ginny