Looks like this is the trip mum and I did today. For $95 it was excellent value. A bit of history, two free cups of tea/coffee, stopping to watch albatross fly near the boat, various little bays and (often old) buildings, and Ulva Island. Luckily the weather held out, I imagine Ulva Island wouldn't be so good in the wet unless you've got good raincoats & rainhats. One by one we came across a lot of different birds, led by our guide (Erin?). I'd never seen Yellowheads before. I missed the Stewart Island Robin the first time around (others saw it) but right near the end myself and another got a fantastic view of one. Though not fast enough to get a picture.