I do- I think! My mom bought it for DD for Christmas. I haven't used it in a shopping cart yet, but I've used in several different high chairs when we're out to eat. I really like it- its easy to put in and padded nicely; I also like that it has loops along the front where you can attach toys (but you have to attach them with your own rings). HTH!
Re: Anyone have the Boppy shopping cart cover?