I dont use one, but my mom uses one with her bad knees, and she likes the 4 wheeled ones, that are lightweight.

I just adjusted her handlebars for her. We were at the grocery store and she made the comment that she walks better with the shopping carts because they're taller.

So, when we got home, I grabbed her walker and extended the handlebars as far as they would go and she's up there running around the living room, showing off how much easier it is for her to walk with her rollator now. I guess I'll be making her other rollator (the one for using outside and in stores) taller in the morning, if I can.

If I ever need to use a rollator, I want a lightweight one that's easily adjustable.