Greg's place is in a great location in Fremont and is clean and comfortable. This is not a modern or luxurious place, but is good for a budget traveler in Seattle. The wifi had issues for me while working remotely, so keep that in mind if you have more than 2 tabs open and more than 1 device with you.
I live near downtown Los Angeles, so the road noise seemed practically nonexistent to me. However, the other neighbors in the house could be heard all the time, so bear that in mind.