I just purchased a RSTV for my daughter to use in the summer, when we fly to Slovakia. I am just wondering, to those that use it, or have used it, how was your child afterwards, getting back into their regular carseat? DD will be a month shy of 5, and I am very nervous about her response to using it for 3 weeks, and then going back into her Frontier once we get back to Canada. I'm worried that she will reject her regular seat because the vest is so different and more "grown-up." Did anyone have any issues with this?