I purchased one each for my Mom and Dad . They are so much better than a walker. It makes it easier and quicker for my parents to get around and the seat is an added bonus, When they become tired, they don't have to look for somewhere to sit, instead they can sit down anywhere with the rollator. These rollators are very light weight, so easy to relocate them. The rollator does collapse, but not totally flat. So make sure you have room in your vehicle for it.
There was a slight difference in the rollators. It was very difficult to secure the collapsible bag onto one of the rollators. The gap between the seat and metal bar was too small that it may it impossible to get the bag strap through the gap. There was no problem with the second rollator