We have stayed here numerous times, but not for a couple of years. It's one of our favorite escapes and we try to get here once a year if we can. If you love special off-grid places like the Abel Tasman park and want to infuse yourself in the environs, in comfort, this is the place to stay.
It is unfortunately, not as good as it used to be. The rooms are well overdue for refreshment and overall cleanliness standards have fallen, but the prices haven't. The staff are young and inexperienced and you don't feel like an exclusive guest, sometimes an annoyance.
We've stayed in several luxury eco-resorts and have been lucky to know what the experience could be. It would only take a few tweaks to return to past glory. That said, it is the best option in the park and our experience would not stop us from returning, albeit with adjusted expectations.
Of most need of urgent attention is the Wi-Fi - you get 200MB per day per user free. The rate card for this is $10 (x2). But you can buy 20GB for 2 users for $13, so why not just give guests that?