Great attitude...whatever works for her and your family is best. Each kiddo is different.
Both of my kids slept in their carseats (exclusively) for the first 5-6 months of life. This totally helped their reflux issues and they really liked the cozy, snug feeling. My daughter prefers the carseat with a fuzzy blanket near her head that she can pull down on her cheek to "burrow" even further into the carseat.
That being said, we recently found out that the incline sleeping position of swing/carseat reduces oxygen flow for babies because their chins are curled forward on their chests more so than if they were laying flat.
Babies naturally get a little less oxygen when they sleep because their breathing slows down, and the extra slight reduction in oxygen while sleeping in a swing/carseat isn't a big deal unless they are sick or have breathing problems. My daughter recently had a very bad cold and was really snotty and coughing a lot. At the doctor's office we found that when she was sleeping in the carseat, her oxygen levels fell to the low 80% range (occasionaly in the high 70% range). Ideally your oxygen levels should be in the high 90% range. She got put on an oxygen tank until she was over the cold. Just a thought in the cold and flu season...