I will preface this by saying I'm not at all sure how similar the transmissions are to an Odyssey, but I'll share my experiences with DW-1.
I have 2 Hondas, a 2005 Civic and a 1996 Acura 3.5RL.
The 2005 Civic we bought new, I have always done the maintenance on it. It has needed little, at around 60,000 miles I did a simple drain and refill on it. I got the DW-1 at the dealer when I asked for Z1. This was probably about the time that Z1 was phased out. I had no idea that Honda built bad automatics or that there was any controversy about fluids for them. Since Mobil 1 ATF did not appear to meet the Z1 standard (yes I know it did and Mobil for whatever reason, removed it from the label). I noticed absolutely no change in the transmissions habits on this one.
The RL has been family owned since new, My Grandparents bought it new, my Mother then got it and now I have it. Until I got it this car has been serviced at the selling dealer religiously. (at great expense I might add) I know they use Castrol Oil and BG products, but suspect they used Honda transmission fluid. I will get the service record out and find out when it was serviced, but guarantee it was prior to the availability of DW-1. As you might imagine from its history, I've ridden in and driven this car quite a bit prior to owning it. The fluid was not in bad shape, it was still dark red, but the car had developed a slight shudder that was more pronounced with recent cooler weather. I decided to do a strainer replacement and complete exchange (following the Honda service news procedure that I found on the internet). The results are that the car has never shifted better, the shudder is now gone, even with the recent weather in the 20's and the shifts are smooth while remaining positive.
I will say I am a Mobil guy and the only fluids ever under consideration were Honda and Mobil, but I'm sold on this DW-1 fluid and it was not that expensive at the Dealer (About $7.00QT).
I will probably do the complete exchange on the Civic at the next oil change, I like it that much.