Haven't stayed there, but the Residence Inn Bothell is 1 minute away from my office. Not a bad location, but depending on where you'll be traveling to each morning, the Redmond Residence Inn may be a better option.
If you plan on heading S. on I-405 in the AM (ie. toward Redmond, Bellevue, Seattle), you'll be in for a LONG commute...as 405 Southbound is horrible in the AM.
Cheers,
-Steve