At times, to be a 'high-performer', you'll find yourself working long hours. Not the same as overseas big 4 or the MBB, but certainly more than what you are 'paid for'. Protecting work life balance therefore naturally comes at some compromise.
New Zealand market is small. That means you won't always have industry or clientele continuity. You'll have to learn how to adapt very quickly and contextualise, which can be stressful when you're doing 8 projects in a year that are literally all from different markets. On the other hand, there are 'long projects' - these are less stimulating and repetitive throughout the project duration.
Following on from above, it can mean that you aren't able to achieve 'depth' of skills that you might get with more specialised opportunities. The obvious flip-side is that you'd get a variety of exposures, so transferrable business knowledge and soft skills develop extremely quickly. To be fair, it's about what you want, so this isn't necessarily a 'con'.