There is no question that this is a quality item. Every piece seems to be top of the line as regards materials. Design, I am not sure. As a grandparent I have seen many car seats for both my kids and my grand kids. This seat may be a touch to ambitious in regards to maximizing their market. The concept of a Swiss Army Knife seems to be their design model. Don't get me wrong, a good Swiss Army Knife can be a handy tool but sometimes you need to narrow your options to get a superior tool.
As I said, the materials and workmanship seem top notch with the seat. However it's complexity is daunting. Talking to a friend on the local police force I found that many car seats are incorrectly installed and consequently not providing the expected level of safety. The physical installation of the seat is relatively clear but the conversion from rear-facing, to front facing, to toddler, to large child is somewhat confusing. The manual also is not straight forward. It hops around and refers to other pages in the midst of explanations.
If you are willing to accept a rather complex piece of equipment with less than stellar instructions, this unit should be the only seat you need to every buy your child as it goes from infant to 120 pounds. (Have to wonder why you are strapping a 120 pound, 4' 9" kid into a car seat rather than a traditional seat belt but the manufacturer touts that range of client.)
Steel frame gives unmatched protection and durability for a 12-year product life
Reinforced deep side walls with energy-absorbing foam for maximum head and body side impact protection
Luxurious two-piece infant body pillow provides extra support and comfort along with memory foam in the seating area
Accommodates children rear facing 5-50 pounds and forward facing 20-90 pounds and in booster mode 50-120 pounds and up to 57" tall
Pace saving design allows extra room for passengers while providing spacious interior for child
If reviewing a product, it may have been received free of charge. That will NEVER have a bearing on my recommendations.