You're 200 metres up on Waiheke Island, at the highest vineyard on the island, with a 360 degree sweep from the Hauraki Gulf across to Auckland and the Coromandel, and the whole point of a table here is to sit in that view for a long lunch. The restaurant and cellar door are open 11am to 5pm in summer and till 4pm in winter, and you'll want to book because the hilltop gets busy, especially when the hop-on hop-off bus pulls in.
They do modern New Zealand restaurant food, with crowd-pleasers you should plan around: oysters, warm herb bread with olive oil and butter, seafood platters and linguine, pork belly, lamb rump, and a pavlova big enough to share, plus a chocolate lava cake. They make and bottle Thomas Estate wines on site, including Chardonnay, Pinot Gris, Syrah and sparkling, and a tasting is the easy way to find your glass for the afternoon.
It's also a wedding and function venue, with three spaces and a lawn of bean bags for when you'd rather drink outside, and the drive up Carsons Road is worth it for the view alone; the hop-on hop-off bus stops at the door, taxis will get you there, and the walk from the 502 bus is a steep 50 minutes.