I would 100% recommend Drexels to anyone who is visiting the area. Especially anyone from North America who wants an authentic taste from home.
The service is tip worthy and the food is always delicious. They have an extensive menu with gluten free and vegetarian options.
The only downside is because they are so busy you have to book well ahead. We have walked in a few times and been turned away.
96 Hereford St Christchurch 8011