Overall no complaints about the Allegiant experience. Flights were early, carry on personal bags were free...

I don't have any advice for future travelers with car seats because we just moved to an empty row farther back and put the seat in the window. Allegiant FAs didn't seem to much care where we put the car seat, however. This is in marked contrast to Skywest FAs who make travel on an Embrear 120 almost farcical*. They enforce no car seats in the exit row, or in the row in front or behind. That means these little planes have a total of 4 seats where you can put a car seat.

*I'm sure many would say that's the only kind of travel on these aircraft.