We always use "The Parking Spot" at BWI , after many, many times using the frustrating long term BWI lots , lol.
The Parking Spot is cheaper , the shuttle buses pick you up AND drop you off at your car and help with unloading/loading your luggage if needed. Their lot is a little closer to the terminals vs the BWI long term lots , and you can pre-reserve a space .
But the biggest reason ............ we have gotten sick and tired of sometimes , long waits for the BWI long term shuttle bus's and worse , that mad rush of humanity to jump on the bus no matter how long anyone else has been waiting. Having kids is 100 times worse . People will literally cut you off and in front of you to get on that bus. Sometimes it takes a few bus's to get through the crowds, and if you are NOT pushy ........you wont be riding that bus ! There isn't a clearly defined "stop" point for the BWI bus's , and everyone is waiting, many deep, so wherever it stops , is who gets on first ! Doesn't matter if you just walked up, or have been waiting for 20 minutes. Its a free for all .
The parking spot is a completely different experience . They have quite enough shuttles, and there aren't tons of people waiting when it pulls up . You can just get on super easy .
The Parking Spot is the ONLY way we park at BWI from now on !