I only use Romaji / Romanji when reading off lyrics. Haha. That way, I could read it faster. But then again, when it comes to studying and learning, of course, we should minimize (if not avoid) using Romaji. What's the use of learning Hiragana / Katakana when you'll use Romaji more often? But yeah, I agree with most of the people here, it is good in the beginning. But never rely on it. It's like cheating. Haha