please please can anyone help i am so confused. I want to rear face my children who are 5, 3 and 16 months. Is the 5 year too big/old? Also i have integrated toddler seats in my car which means i would only need to turn the complete adult seat around and not buy rear facing seats??? The manufactures recommend that while the toddler seat is in use (i.e..the 5 point harness) it should be rear facing. All the children safely fit the 5 point harness so does that mean they are ok rear facing. I am really worried i have got it wrong 
Also because the whole adult seat turns, headrests get in way of any view i may have in rear mirror and how do you keep an eye on rear facing children when i would in theory have no where to install mirror 