Edinburgh Airport has grown considerably in the last ten years, now boasting direct flights to America as well as plenty of European and British destinations. With its growth it has lost the pleasant provincial airport user-friendly operation that it used to enjoy but it is still relatively hassle free. The only recomendation is to avoid booking luggage through Heathrow in London if making connections there as you tend to arrive in Edinburgh without your bags! Efficient bus service to the City Centre terminates outside Waverley train station next to Princes Street.
There is not much difference between a Guesthouse and a Bed and Breakfast other than an implied larger and more professionally run establishment (though this is not always the case!). A guesthouse is more likely to have staff, a 24-hour reception and better facilities for guests than a Bed and Breakfast. They may or may not offer lunch and dinner. Learn more about accommodation types