Stephanie that is false. You have to check your car manual for if it allows latching in the middle seat. If not seat belt install only. LATCH is all depending on if the actual car make/model allow it. Also new laws do not allow latching of a combined weight of car seat and child over 65 pounds.
Can't help out with the fit- though I will say it has fit in our BMW x3 which has a small back seat. It is the only car seat we have had for our daughter, birth to 16mos thusfar. ( the headrest raises in it, so you won't have a problem with height unless your headrest gets in the way. I would recommend purchasing online from Nordstrom- free shipping both directions so you can't go wrong with that :). Good luck!
Me and kids are frequent flyer and also use Gogo Babyz Travelmate since 2009 and we absolutely love it. We have used Travelmate with Britax/Maxi Cosi and Evenflo convertible seats and it is the best solution for the airport! Travelmate is also compatible with Pria 70.
With my experience, I'd say yes, but not more than any convertible seat. This seat is a bit harder to install than other convertible seats I've dealt with, but any convertible seat is going to be time-consuming to switch between cars. If money allows it, two convertible seats (one for each car) is easiest.