How much of a hassle is it to get kids in and out of car seats in a Model S? As my kids get bigger and taller (4 years old, 40lbs), I'm finding it more of a pain to lift her up in my SUV and get her into her car seat without having to worry about hitting her head! I'm assuming the Model S is no different although I wouldn't have to lift her as high, right? Because of this, I'm really leaning toward a Model X where the falcon doors would alleviate me of that problem (on top of allowing me easier access to the third row) unless I put her in the rear facing child seats of an S. I'm thinking that I'm not wanting to worry about her getting overly hot back there especially in the summer. Is this an issue for S owners with children?