While I'm used to bigger bikes, I have to agree about the low center-of-gravity effect. It made the Wing much easier to handle than I expected. Also ditto on practicing slow-speed maneuvering, but that applies for any bike.
Years ago, my sister and her husband were on his Wing, with their daughter riding with me on an H-D. The women swapped at a stop because my sister was always perking up at the loud exhaust of the Harleys and had never ridden one. The ride didn't last long. She wanted back on the Wing. She commonly sits back while riding, takes pictures, reads a paperback...she even fell asleep once. She's wonderfully comfortable on that bike and won't give it up. And for me, the Wing is just a completely different world to ride...power, handling, and I don't ache or hurt when I get off the bike after a couple of hours.
Your wife will probably love it. Remember the old adage: if mama ain't happy, ain't NOBODY happy!
Just do your homework on which years to focus on, but as I found out, it's nigh impossible to find a bad year in the bunch. Good luck...ride hard, ride fast!