If they can send even a drone on such a journey it will be a proof that it’s practical. I don’t know what the transition from subwarp to superwarp would be like. I’d think it would be impossible to keep the ship, such as it would be, intact.
I'm far from an expert, but I've done a bit of curious reading about the theory behind faster than light travel via bending space over the years.
If what's being proposed by certain physicists can be accomplished, the ship and its occupants wouldn't feel a thing during such a trip. In fact, they wouldn't even have a sensation of movement.