We recently bought the safety 1st grow and go car seat and I absolutely love it!! I wish I would have know about it when I was pregnant because this is literally the only car seat she’ll need!!
We have a graco extend 2 fit and a diono radian. The dionos are HEAVY but they’re slim lined so they fit better is smaller vehicles. My friend fits 3 dionos in a row in her corolla. The diono Iives in my husband’s Sedan and the graco is in my SUV. I also take the diono when I fly with my kid. I have a case for it and it folds into a big rectangle.
Comfort, I would go graco but if space is an issue, diono all day.