Britax Frontier Booster Car Seat

I have loved all the Britax car seats we have owned (marathon, roundabout, boulevard, diplomat).  Superior comfort and easy install.  The Britax Frontier car seat definitely has comfort.  My kids are big for their age, and they both were very comfortable in the Frontier.  The install was difficult, but not impossible.  But then we had to move the car seat to my mom's car...and it wouldn't fit with ANY of the installation methods (latch, long path, short path).  Very frustrating.  Then I tried to move the seat to the 3rd row of our suburban and again, no luck with the install.  Not even close to being snug, and the seat (and my child) have to be in the 3rd row because our family newly expanded, and this is the only set up that will keep the peace in the car!  Frustrated, we pulled our Graco nautilus from my husband's car, and that fits well.  I love this car seat, but I just can't have a seat that is so hard to put in, and a seat that won't fit in some vehicles is very frustrating.  Great seat, just make sure it will fit everywhere you need it!