I've been using Shadow for the past few months as I've been on the road and didn't want to drag my gaming PC with me. Overall it's been a great experience. The biggest downside for my use case is that it's very sensitive to internet quality- internet that's totally fine for streaming video, browsing, etc will cause games to be unplayable on shadow since you need such consistent throughput and latency. Related to this, I haven't gotten USB passthrough (or the joystick forwarding) to work at all really, and I'm guessing that's also a connection quality issue.

For your use case where you're using it at home to downsize I think you'd avoid all of these problems, assuming you have good internet at home.