Ok, don't try this at home, but this is the fun way to go down a ladder!!!
This is the last ditch method that we are taught for getting out of a room when you have 2 seconds to get out or be baked to death. This photo is in training, so he is tied into a safety line with an instructor in place as well.
If you do it really well, it will only take about 3 seconds to get from inside the second story to the ground. Kind of a controlled speedy decent.
Back to the real topic; Ladder rating does help your confidence level allot as well. Type IA are usually more stable feeling than a lesser grade. I am spoiled with fire service ladders because they are rated to 750 lbs. Get the highest rated that you can afford.
R.J.