I stayed at this hotel for four months while working at Microsoft and found the cost comparable to a local apartment. The cheapest local aparment I could find was an unfurnished studio which was slightly less expensive but came with a 10 month lease. They are not many studios available in Bellevue, most of the options were one-bedroom unfurnished apartments.
This place is very quiet and well-run and close to everything - Microsoft - shopping, etc. The staff is extremely friendly and efficient and runs a full business center (faxing and mail). Each room has a hard-wired internet. As one of the other reviewers pointed it, it can go down but in the four months I was there it was out of operation only about 3 days.
The only real cons are the lack of a dishwasher and gym (however, 24-hour fitness about 1.5 miles away has month-to-month memberships under $30).
The rooms come with a local phone. However, be sure and bring your cell because if you make a non-local call (and some 206 calls are in that category), you will be charged $1.95 /minute. Read carefully the list of area codes and exchanges that are on the "free" list (this list is in the drawer under the phone). The local phone comes with voice mail and is very convenient for incoming calls.
If you expect to stay at least 60 days, I would inquire up front about the 60-day discount. You could easily save several hundred dollars.
One of the biggest advantages to this place is the flexible lease, especially if you don't know how long your job will last. A local apartment will charge you a one or two month penalty to break the least, (depending on which day you give notice and once you give notice you are committed to leave.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC