We recently switched from an Evenflo Triumph to the Britax Regent. Our daughter is 33 months old, 33 lbs and just under 40" tall. She had reached the top limits of her old seat, but being less than 3 years old just isn't ready for a traditional booster. I shopped for several weeks before finally deciding to take the plunge with this seat. My hesitation was price and size.
Ultimately price is easy to overcome, as what is more precious and worth more than the life of a child?
As far as size goes, it is a large seat, no question about it. However, I drive a 2006 Honda Civic Sedan and don't really see how this seat is that much larger than the other seats I was seriously considering: the Evenflo Generations (hated the flimsy arm rests and adjustable head positioner), Graco Cargo (too narrow, not much room for a growing toddler), and the Recaro Young Sport (head wings were too big).
This seat is installed in the backseat on the passenger side. It DOES indeed fit in my car and does NOT obstruct my view out the back window. In fact, the top of this seat is actually lower than the rear headrests are in their lowest position. It does take up the majority of one side of the backseat. We are only a three person family, so I do not have to consider space in my car for additional carseats. There is still plenty of space for one additional backseat passenger and the person riding in front of where the Britax is installed can still ride in relative comfort. I will take some pictures and post them for others to see.
My daughter seems to really enjoy riding in this seat - I think her only complaint would be that it rides lower in the car and makes it a little harder for her to see out the side windows. As quickly as she is growing, I don't think that will be an issue for long. She often nods off in her seat and the side is just deep enough to allow her to do so without her head flopping all over the place. All in all, I'm very happy with this purchase and would recommend this seat to anyone who asked!