Well, my next door neighbour has had two pairs of Dubarry leather boots. She thinks they're cr*p. Both pairs leaked after less than a season - and they stay wet for a long time. She does/did wear them a lot though.
Best deck boots by far in my experience (15 yrs full time professional sailing and a lot more besides) are Gill tall boots. Good non slip, excellent support. However, they are not as good now as they used to be - less support. Only problem is the rubber degrades after a year of two and they then leak. Still, you can buy three pairs at least before you spend more than one pair of Dubarry's cost. Of course the Gill's aren't as flash.
Deck shoes? Top of the range Dubarry, best I've ever had. And you can (or could) get them resoled.
Lest there are those here who know me, I have no connection at all with Gill clothing - sod it!