I recently purchased the Ruby in Blue Lagoon for my small 5 year old Granddaughter. I'm going to give it a 3.5 rating. The reason being the seat back height was advertized all over the internet as 22" but is only actually only 21". This is a big difference when considering that I bought it for a 5 year old. She is only 36 lbs and 39.5 inches tall and doesn't have much room to rest her head when she gets just a little taller. Also it doesn't stand alone as advertized but does rest up against something in the standing position.