Staying at Dirk and Jackie's was great! I had just moved to Seattle and needed temporary housing while looking for an apartment, and Dirk and Jackie's fit the bill. It was VERY central - easy walk to Capitol Hill, Downtown, Belltown, South Lake Union, etc. Also very close to Link light rail and numerous bus stops for traveling further. Their kitchen is equipped with the basics - I was able to make breakfast and lunch every day, which was a huge help on the budget.
Jackie and Dirk were very communicative, and even offered to come in and change the sheets/replenish the supplies/etc. I found the wifi to be great and speedy.
The only downsides that I would say are that the building itself can be somewhat questionable - the hallways smell smokey and you can sometimes hear a neighbor's loud TV. In addition, this place does not have its own washer/dryer - instead, you have to use the building's which are often used to capacity. Overall though, the unit itself is immaculate and spacious. Highly recommend!