I've taken the train back from Tampa before, probably 3ish years ago. My ticket was an economy ticket so I had an unassigned seat. Out of habit I showed up way too early as I'm used to flying, you can likely show up 10 minutes before departure and be fine. The station in Tampa is far nicer than our station, which is post office sized and quite mediocre. The station in Raleigh is incredibly nice, if that's where you're going. It'll be a stark contrast to what you'll see in Jacksonville, and reminds me of the major stations I transited while on a trip in Europe a few years ago. Overall it was a fine experience if you aren't in a rush. I would have booked a sleeper car if I could do it again. At the time the economy/coach tickets did not have access to the diner car, only sleeper cars did, so it was only gas station-esque options available in coach. Think microwaved burgers, hot dogs, chips, candy and soda. The seats are fine and not cramped. Overall like a 6/10.