We have now used this service to park near BWI at the Aloft hotel lot for a week, and over a long weekend, and it's been great! It's the lowest or close to lowest cost - easily booked online, very close by BWI, the hotel receptionists have been good at quickly checking you in and getting you on your way, and the shuttle drivers have been fantastic - very helpful and extremely friendly. We like leaving our car at a lot where a lot of people are coming and going, hotel staff are nearby, etc. rather than a quiet lot with little security. We will continue to use this service!! We will never use one of those home to airport shared ride shuttle buses again - the last time we were kept waiting 30 minutes before the shuttle (which was there would leave the airport), the driver was surly and nevery spoke a word, and it was expensive! We love having our own car and Book2Park is very easy!