I bought two Graco TurboBoosters from Babies 'R Us in November 2007. My twin boys were at the point of needing something beyond a five point booster and sadly, we could not fit the bigger five point boosters into our Ford Explorer.
Putting the TurboBoosters together is pretty easy and self explanatory. You do need a screwdriver. Popping the armrests into place is a bit challenging, unless you're okay with pinching the skin on your hand! I then had my boys sit in their seats so we could determine the proper height for the headrests. Another easy task, that I just confirmed we did correctly by reading the easy directions!
Installation was very easy. Unlike the other seats they had been in, these you just put on the vehicle seat, thread the shoulder/lap belt through appropriately (easy!) and that is it. When your child sits in the seat then, you just put the belt across them properly and latch it into the vehicle safety belt latch. After making sure the belt is across their chest and lap appropriately, you are good to go. Very very easy installation. This is perfect for when my boys stay with Grandma overnight. I can just take the seats out of our vehicle, put them in hers, thread the belt through the appropriate slots and that's it. It takes all of two minutes, if that.
Cleaning the fabric is very easy. I believe it's mainly poleyster? It's very easy to clean and so far, we've only had to wipe it down with a baby wipe. Unlike many other seats, you can't remove the covers. But I imagine even if there was a big spill, I could easily scrub the fabric and hose it down outside.
As evidenced this past weekend, the headrests don't hold their heads up when the kids fall asleep. Being the back of the seat is straight up and down, my boys heads slouched forward when they fell asleep. Even with the shoulder slot with the belt going through it near their neck, the belt did not cut into their necks and they didn't slouch out of a safe position either.
My boys have had no complaints about the seats at all. I was nervous moving them into boosters, thinking they'd tuck the belt underneath of their arms and such. But with the shoulder slot being where it is, it helps it stay in place if they even tried to slip it under their arms - which they haven't! They enjoy their "big boy" car seats very much!