Yes other than the mobility issue a good time was had. One of the waiters even recognized us and vice versa from a cruise maybe 5 years ago. On another note, how challenging is a scooter to operate if you don't drive. I've never even touched one so I'm going to guess it can be pretty simple but I've seen someone nearly wipe out in a grocery store as well.I am a Regent cruiser and sadly even the best run companies can have service failures. I agree with Neil in regards to arranging for a wheelchair or electric scooter to be delivered to your Mom on board. These companies service cruise ships large and small all over the world. An Electric Scooter might give your Mom some real freedom and pleasure to enjoy the ship while onboard rather than being exhausted getting from place to place. The cost of these services is very reasonable.
I hope you enjoyed your cruise aboard Mariner, she is my favorite Regent ship!