The key challenges are lack of awareness, affordability and accessibility. The reason for this mass consumption of fast food is its affordability and accessibility. Manchester often appears favorably in lists ranking the affordability and livability of U.S. cities. Enthusiasts praise the cars for their looks, reliability, performance, and affordability. General Dynamics demonstrated their vehicle met Tier 1 affordability, reliability, and other requirements. AlphaSmarts were very popular in schools for their affordability and durability. Variations in affordability of housing between areas may create labour market impediments. There are problems of housing affordability and poor access to services. Niche's Best Colleges ranking focuses on academics, diversity, affordability, and student satisfaction. This type of lift is often preferred due to the affordability and ease of installation. The program has been associated with the lack of housing affordability in Vancouver. Other criteria include affordability and income level. Vancouver is the most stressed city in the spectrum of affordability of housing in Canada. This program was referred to as the Homeowner Affordability and Stability Plan. Meeks was also concerned with issues of housing affordability.