For cons, the ferry is really small, it barely exceeds the surface of a box of 6 eggs: it's a shame to make such object "technique" and limited to a Lilliputian format. This would not have costed bcp more expensive to do a standard size.
And the consequence of this is that small size to accommodate 21 ice cubes, icicles are obtained: it is necessary to use two to get the equivalent of a normal ice.
Too bad, this could have been perfect if its designers had some practical sense.