Bests & Worsts Reviews from Amazon

I own a Britax Marathon which I still use for my younger child, and had purchased the Britax Frontier 85 as a long term seat for my oldest child, currently 3 years old. Occasionally I need to remove the car seats and install in another vehicle. The Marathon can be done with ease. The Frontier, is the most frustrating installation I have ever experienced. I believe it is due to a cheaper design. The Marathon offers 2 independent straps for the latch system. Each is pulled individually for a taught fit. The Frontier however, only offers 1 pull strap for both latches. This may have saved $10 in design and construction costs per unit, but for the customer , far more a struggle than the Marathon design. What makes it difficult is how incredibly easy it is for the strap to become twisted and tangled in an area behind the seat which you have no visual nor access to. I have read some of the positive reviews here and one individual was questioning intelligence for those that are having difficulty with the installation. I am a technical engineer by day with a master's degree, and can assure you, I am not lacking intelligence. I am also a volunteer firefighter, and have knowledge and experience on how to install, uninstall and in emergency situations, cut these seats in half. Their customer service is what may save them from losing me as a customer. The representative acknowledged that if you pull taught when the strap is in a twisted state, that could cause it to want to twist during successive pulls. They are sending me a new set of straps to try. Ultimately I'd rather see an independent 2 strap design like the Marathon.