Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Amazing strength in a 8 pound frame

I purchased this walker for my 360lb mother who despite her age and size is very active. This is the second of the same model for her. The first one would still be in use if I could find replacement wheels. Mom wore the rubber right off them. The wheels are not that durable on the sidewalks as they appear to be designed to have a low impact on interior floors and carpets. But she used it four years and countless miles. I know how tough she is on stuff and suprized how well this unit held up. The proof is I bought a second one.