FSU showed it to us this year, if you do it right, you can put together a good team.
I can see the portal being a two edged sword. On one hand you are getting a proven commodity of talent that has shown they can play at the college level, but on the other hand you don't have someone you have brought along in your culture and knows the "process" (if you will) to being a winner. If you get too many high dollar egos on a team, it will be just like a NFL team full of ring-less superstars.