I enjoy Amtrak a lot. There are stretches (Seattle to Vancouver) that are more economical than driving. There are stretches (Seattle to Portland) that are more expensive and take a little longer, but occasionally worth it. And there are stretches (Seattle to Los Angeles) that are completely out of the running, because they cost 4x what a first-class ticket on an airline costs and take four days.

The trick to Amtrak is they run on the same track as BNSF. BNSF is not required to inform Amtrak of its schedule, nor accommodate non-commuter rail travel. Which means Amtrak will occasionally sit on a pass rail, waiting for a freight train. It also means there's a good chance that your train will miraculously transform into a charter bus with all the glamour that entails. The last time I took Amtrak to Vancouver it ended up being a bus that got lost on the way to the station. We all ended up voting on which turns to take because none of us wanted to take on the ruinous data charges you get in Canada.

Just be aware of what you're getting into. I'd be tempted, too, but that whole "bus" thing looms like a specter.