We have no off street parking and DS1 was not walking when DS2 was born so I would use CC to put DS2 in just to get to and from car so I could carry DS1 as well (started walking when DS2 was 3 months old)

Was easy to chuck over head and put him in, if I wasnt going a long way I wouldn't even bother taking it off as was not bulky under seatbelt (off course DS2 was in his car seat and not in sling)