I stayed here with a coworker for a conference, and we found Cathy and her place to be lovely. There was enough room in the unit for both of us to stay separately and spread out, and the location is perfect - close to the Convention Centre, Pike Market, and all of the great restaurants in the Capitol Hill area.
The unit was clean and had all of the amenities we could need. Cathy was prompt with her responses and made check-in and check-out a breeze! We really appreciated the binder of details she put together about the unit and about the area - we found the restaurant summaries and reviews to be extremely helpful. It was a nice personal touch :)
I would definitely recommend Cathy's place and would happy to stay there again on my next visit to Seattle!