I have a few questions regarding the extra comfort seats. If I book this type of seat it will allow me to go ahead and pick which one I want correct? Do I have to do any additional seat selecting at the 24 hr mark or is the seat I selected back when I purchased my ticket still my seat? Also if I purchase just a regular main cabin seat do I still get to select my seat when I purchase my ticket or not until 24 hours prior? I've never flown HA before and trying to understand the rules and procedures. Trying to make sure my family and I get to sit together and stay together.