Evenflo Everest Booster Seat

Carseat Type:
High back Booster for kids 40 - 100lbs
The back can come off to convert to a low back booster

PROS:
Open seatbelt guide allows seat belt to move freely.
Flip out cup holders and movable armrests, a real plus for my Daughter
Ours has reading lights built into the headrest, certainly not a necessity, but really neat for the kids.
It is nice and tall, DD will likely fit in it with the back on until about 9-10. (She is currently 8yo, 4'3", 70lbsand on the middle height slot.)
Very light and easy to transfer from one vehicle to another
Armrests can flip up and out of the way. Great feature if you're trying to squeeze 2 seats side by side
The back does come off once child has grown too tall, but does not fall off easily, like the Graco Turbo.
Positions the seat belt properly across the hips and shoulder in every vehicle we have tried it in.

CONS:
Doesn't have side impact protection
The seat is narrow, it may not fit stocky kids very well with the armrests down. Now that DD is 8 she has to flip 1 armrest up so she doesn't feel squished.

VERDICT: I love this as a booster. It is inexpensive, comfortable and so far "cool" enough for her. (All her friends are in low back boosters, or just the vehicle seatbelt, so she does bug me from time to time about that!)

Update On Jan 26, 2010: I just wanted to add that this booster seat comes with a little pillow (shown in the picture) which my daughter HATED. She found it incredibly uncomfortable. It is attached with velcro, so we simply removed it.

Update On Dec 07, 2010: We removed the back and have used the Everest as a backless booster and DD just loves it. She likes that the armrests flip-up making it easier to buckle herself in. She is tall enough now that she doesn't need the belt guide that comes with the seat. I don't like it so we didn't remove the back until she was tall enough to go without it. For DD the Everest booster positions the belt perfectly across her hips.

Th low back version of the Everest is perfect for the older child who has outgrown a high back booster, but still does not pass the 5 step test for riding in a vehicle seatbelt.