Haven't worn mine on a boat (there's a shortage of those in Vegas), but wearing them for racquetball I found I was lighter and quicker, had better balance, and was making shots I didn't think I could reach. . .after I got used to them. Takes a couple of days as your legs have to start using muscles that don't usually get used with all the support other shoes offer. I've found they don't grip brilliantly on some wet surfaces, like tile.
And if they do start to stink you can throw them in the laundry.