Would I stay here again? Yes!
The biggest feature about staying here definitely has to be its location. It's sandwiched right between Downtown Seattle (Columbia Observatory, Pike Place Market, original Starbucks, gum wall, etc) and Capitol Hill neighborhood (ton of bars and restaurants).
A colleague and I stayed here for about 3 weeks and we basically walked everywhere. There's a Target and QFC (grocery store) a few blocks away. One block away is the Starbucks Reserve. Plenty of other coffee shops in the area as well.
If you're into nightlife you'll find this place convenient since you'd be able to walk to a ton of bars in Capitol Hill.
Overall it was a good experience to stay at Siena's condo. There were a few hiccups, some out of the hosts control i.e. the heater going down for a few nights. The condo is in a very old building so the heating system is antiquated. If the heater goes down, it affects all the units.
The place itself has all the basic necessities you'll need for your stay. Some of the appliances are on the older side, but were good enough for us. To me the decor felt like a mix between 80's and modern, but overall a homie feel.