Yes. I have a booster(that is not the seat). In fact I have two.
Of course now that that's settled in my mind. Here are my next questions.
Is a booster with a back better than the backless ones? I have both to use interim.
Which carseat will give us a few more lbs at the best price?(in Canada)
I know the Evenflo combo seats harness to 47 pounds in Canada, and those are pretty cheap as well.
If you use a booster, you want a high back booster with lots of SIP. I would stay away from a backless until she outgrows the HBB. The general rule is RF as long as possible, harnessed as long as possible, high back booster as long a possible.