Bubble Bum car seat perfect answer to Arizona's new booster seat law

Arizona recently passed a law that goes into effect in August requiring kids to stay in boosters until age 7. That means many parents will be looking to go back into booster seats, when they thought they'd graduated. I am among this group with my 6 year old, tall daughter. She is tall enough to sit properly buckled sans a booster. We actually bought a new Pruis because we didn't need three car seats anymore. But now we've found ourselves needing three seats again. So I started looking around for the narrowest and safest booster seats - that's when I came across the relatively new Bubble Bum.
Bubble Bum is listed on the Best Bets list by the Insurance Institute for Highway Safety. (They also have great information on how ANY booster should be used properly too.) That caught my eye. Add to that - the Bubble Bum is under 13" wide. Perfect! I watched their video on how it works and had to try it. Bubble Bum kindly sent me a seat to test out and write about. I was in love right away, as were my kids. So much so that after a few days use, I bought another Bubble Bum for my almost 5 year old daughter to test out too right next to the first one. They both wanted to sit on the super soft airy PURPLE cushion. And I wanted to see if it would make a difference in space.
The Prius is surprisingly roomy, but three seats is still a tall order. But with one Cleck backless booster, one Bubble Bum and one SafeGuard Go Hybryd 5-point harness car seat - all three of my kiddos fit. Though my 6 year old, who sits in the middle was still a bit crammed. Good thing she's skinny! Then I took out the Clek and put in the second Bubble Bum when it arrived a week later. Both girls have more space and both report they are more comfortable. My six year old in the middle loves not having her sister's seat arm rests running into her.
My six year old has no problems with the Bubble Bum. She sits down and buckles herself in quickley and properly. I keep the shoulder belt and first red lap positioner attached. She then pulls the belt across herself like normal and buckles it in. She then slides the belt through the second red lap positioner. That's it. With three seats in place in our Prius, it is a little hard for her to find the car buckle to snap her belt into, but it is easier with the two Bubble Bums and one other seat than it is otherwise. In our Jeep, which has one inch more per child's seat, she has no problems.
My five year old has a little bit of difficulty. She finds it hard to get the seat straps through the red buckle positioners. Otherwise, she likes it. My six year old helps her out by sliding the belt through the positioners. Both girls now have their seat belt properly place in their shoulder area. With Bubble Bum's positioner, they don't fiddle with them like they did before.
Another nice feature of the Bubble Bum... they can easily deflate for storage or travel! That means next time we visit my mom and sister in Texas, we won't have to borrow boosters or bring bulky ones that are such a pain. These will go right in the kids luggage. That is awesome!
Whenever my son is old enough and tall enough to move into a booster seat with buckle, I'm going to buy another Bubble Bum for sure. (He even likes the purple color of the Bubble Bums - but I'm sure when he's older he'd rather have a blue one. They're supposed to be made in other colors soon.)