I purchased the aluminium walker as I was finding my steel framed red walker too heavy to lift up curbs and carry up my 2 stairs. My new aluminium walker is so much easier to push, to lift and carry up the 2 stairs I have. It's very sturdy my only concern is the breaks are a bit hard to push down and lock but the walker is new so it will become easier in time. Very happy with my purchase, the only assembly my son in law had to do was put the handles in and adjust them to the correct height for me, as it all came assembled and the delivery driver was kind enough to walk up to my first floor flat to deliver it.