I can report that I thoroughly enjoyed my day out with friends on House & Garden Nelson tour.
We managed to see all 11 houses in the timeframe and even squeezed in some lunch in the middle.
Only things I would suggest should we be lucky enough to have another one:
1. Would be good to know there was a loo at one of the venues...even a portaloo, in case of emergency
2. I really think that you could have two venues...either end of the grouping that could offer a glass of bubbles for a price, so that at the end of a long day you could sit down in someones garden (or in the case of Woollaston Winery - their winery garden) and sip a glass of wine/bubbles to finish the day. This is what we needed at the end of the experience and we had to get home in order to have that.
Otherwise, thoroughly recommend the expertience. Hope to do it again.
Thanks