I took a full-day wine tour to the Yarra Valley. We visited four wineries: Chandon, Oakridge, Soumah and Madden's Rise.
Chandon was exactly what I expected. Really stunning, beautiful tasting room with ample seating, etc.
I expected more out of Oakridge. This is an award-winning winery, but the facilities were cramped and very noisy. There's no tasting room - our group stood around the counter of their wine/gift shop and the sommelier literally cleared off space on the small counter to make room, we stood during the entire tasting. Then, due to the number of groups, during the tasting the sommelier had to switch back and forth between our group and the group standing next to us. Adding to the noise was an impromptu employee staff meeting taking place behind the counter. The lunch and wines there were very good, however.
Soumah is a boutique winery and we were the only group there. We tasted an impressive number of wines (6-8) and the sommelier was knowledgeable and friendly. We finished with a visit to Madden's Rise. We tasted a long list of wines as well (8).
In terms of the overall experience, I'm used to tours where each winery arranges their own tour guide to meet the group and provides a short tour of the facility before tasting. We only received a tour of Chandon, and the tour was guided by our driver and guide, Paul. We didn't get this at the other 3 wineries - it was more of a tasting-only and tasting-and-lunch visit. No behind-the-scenes tours.
Paul was our driver and guide and he was professional and courteous, we could not have asked for a nicer host! The bus was spotless and not overcrowded. Paul knows a lot about winemaking in the Yarra Valley, and I would definitely recommend this company to others. It appears to cater to smaller groups, and I like that.