This belt is a major help, especially as my bump has grown. I also plan to take it with me on flights. I would buy two. I have one in the driver's seat of our car and another one on the passenger side to make it easy. I bought one at first and wasted a lot of time trying to swap back and forth.
It would be great if the future version had a clip to hold the lap bottom in place. It can be a bit fiddley if you have on a long dress, skirt or coat.