Britax is going to be coming out with two brand new harness-to-booster seats this summer! The Britax Pinnacle 90 and Britax Frontier 90 are two very similar seats with some important differences. Both seats have the same recommended use. For Forward-facing mode: 2 years and 25 pounds up to 90 pounds, and in Belt-positioning booster mode: 45-62 inches tall; 40 to 120 pounds. Both have the following features: Quick-Adjust, No-Rethread Harness Premium Lower LATCH Connectors Base with SafeCell Technology Integrated Steel Bars Energy-Absorbing Versa-Tether True Side Impact Protection Five-Point Harness HUGS (Harness Ultra Guard System) Chest Pads Easy-Remove Cover Multiple Buckle Positions EZ-Buckle System What the Pinnacle 90 has over the Frontier 90 is Side Impact Cushion Technology, which is extra cushions and support. Both seats are great, and are set to be out this Summer:)