I have been shopping around for the perfect rocking chairs for my porch, and these completely hit the target!  I love the vibrant colors (I chose the turquoise ones), and prefer the low maintenance of the plastic material.  Assembly is required, and it definitely takes 2 people, but it's easy to do...less than 30 minutes per chair.  The backs are quite straight, but that can be overcome with a pillow for lumbar support.  We enjoy these so much that we sit outside with blankets to watch the snow fall.  Highly recommended!