Is this pizza unhealthy?

Ok well I've totally became addicted to a spicy fajita pizza that I get in the supermarket and I've had it for dinner three times this week but I font think it's too unhealthy because the entire pizza is just 628 calories and 20g fat, plus I've been eating it with a leafy green salad (the salad also includes peppers celery red onion and tomato) and for breakfast I've had weetabix with a but of semi skin milk and for lunch a Banana - is this okay? It seems like a healthy pizza...?