Short version: Flex is awesome, knowledgeable, on point and we would book them again in a heartbeat and tell all of our friends about them!!!
Long Version: My wife found Flex after some internet searches. My wife and I came to Napa with her sister and her sister's boyfriend and we wanted a good, solid wine tour that did not feel like a third hrade field trip. My wife read reviews and called around. We decided to go with Flex based on reviews and after speaking with James.
We arrived about an hour late after a terrible experience getting from San Fran to Napa (rental car nightmare, traffic, accidents) and found Holden (our guide) waiting for us. We had to skip our first visit because we were late and ended up being able to add it on as our last stop. Holden worked with us, took pics, explained everything about the region, his experiences,
told us about the business, etc. and was friendly, great to be around.
One thing I have to point out is that we went to one winery where we ran into another Flex group that was just leaving. We had our lunch with us (Holden was great in recommending several possible places to stop and get food, hive us time to order, etc. and then take the food with us to eat at the next stop.). The guy at the front door of the winery gave us a bit of a hard time because we had our food with us! Holden and the tour guide of the other group (Diane) quickly jumped in to get us the table the other Flex tour group just left and let us use it! We sat down, started our tasting and immediately had several winery employees come over and apoligize for the hard time at the door and then escort us to another table. We felt kind of like mini-celebrities with all the attention and all. We then got to eat our lunch with a great view.
Holden had water, coffee drinks, Red Bulls, and snacks always fully stocked between the time we got out of the Flex and back in for our next destination---and it was well appreciated!! Several hours of wine tasting can wear on you and it is nice to know (and a pleasant surprise) to find everything ready and waiting for you! It was definitely hella-clutch!
You will not be disappointed with Flex Tours and I am proud to say I would book them again and not bother searching for anyone else! I do not leave many reviews, but I do read alot of them. I hope you book these guys, as I took the time to write this review and hope it helps you. I had to write this immediately after the tour because I would have put it off, as I am a procrastinator. I really hope my review helps you.