I have stayed at The Heathman (my favorite), The Nines, The Embassy Suites, The Hilton...many hotels in Portland. This hotel is my favorite for a few simple reasons.
1) Location: It is a quick walk to shopping, one of the main food cart pods (a must go to if in PDX), the max and Pioneer Square.
2) The Staff: The staff is always great. They are friendly, helpful and knowledgeable. I have never had a bad experience at the hotel and everyone fromt he bell desk, to the front desk to the waitress to the maid have all been great.
3) The rooms: The rooms aren't big, they aren't super fancy, but the beds are comfortable, the bathrooms are great and every room I have ever stayed in has been quiet.
If you want to spend up on a room and get a grand experience, go to the Heathman (great service, wonderful rooms & the restaurant is amazing). If you want to stay somewhere that is comfortable, the staff is nice and the price is often very reasonable, stay at The Westin.