We are a family with two kids, and this apartment was perfect for us. Location is fabulous--walking distance to the art museum, Pike Place Market, aquarium, ferris wheel, and ferry docks. Seattle Center, the Amtrak station, and the international district were short, inexpensive cab rides away.
The apartment itself was a bit worn, but very clean. Beds were comfortable. We used the sofa bed in the living room so that each kid could have her own bed, and that worked well. The kitchen was a typical rental kitchen--i.e. it was great for making breakfast or spaghetti, but it would have been pushing it to cook a gourmet meal. (There's a full-sized grocery store, Kress IGA, about 4 blocks away.) We used the gym and pool in the building, and both were nice. My kids had the pool and hot tub to themselves both times that we went.
I can't speak for all the apartments, but ours had a good view--better than I was expecting--of Puget Sound and the ferris wheel (and also of the viaduct freeway--it will be great when that is gone!)
This was a really economical way for our family to stay downtown in a nice 2-bedroom apartment, for less money than most downtown hotel rooms.