NZ has some most livable cities in the world: Auckland, Wellington to name a few. Also one of the safest country to live.
Part-time job opportunities are plenty for international students through which you could recover the cost of your living expenses.
NZ is easier country to immigrate if your plan is to settle abroad. Add beautiful landscapes as another reason to ;)
As far as job opportunities are considered, NZ is a small country and offer limited work opportunities for internationals. Even though few employers might prefer locals ,as there is a lack of skilled professionals they are open to all, it would be upon you to sell yourself well.
Further research about work opportunities according to your field of interest and chose the best country accordingly. Goodluck !