Convenient, but did not leave happy
I should start by pointing out that my stay was while they were renovating the main entry, which created a whole bunch of headaches. Upon arrival there was no where to park for check-in, so I was forced to double park and risk a ticket. After I checked in and started looking for a permanent parking spot, I discovered there were none to be found. Ended up circling the lot for 15 minutes until I was lucky enough to spot someone leaving. The room was small and lacked a real desk, which made getting any work done almost impossible. Finally, when my neighbor turned out their shower (which I could hear) I discovered that the water pressure made my room shake (note: from the midwest and never experienced and earthquake before, that's what I thought it was at first).
It quieted down from there, and I was able to get a decent rest before heading to the airport the following morning. However, there are plenty of other discount hotels around Sea-Tac. I'll be trying one of them next time.