I usually use Conair Turbo Extreme steamer for that. I would not say it is great for travel due to its size and weight. I like the fact that you can read here, the steaming clothes also help remove germs. This works well on sweaters or sweatshirts that may not iron well. In general, it works pretty well at removing wrinkles but it does take a while.
For the first-time use, you may need to wait a bit longer than it said until steam comes out (i tough it was defective). After that, it works fine.