Samsung hasn't really set the smartwatch bar very high.
It's expensive at $300. The interface lag is a drag. A button press is required to activate voice control. Battery life is "about a day" according to Samsung. It doesn't really bring anything new to the gadget game.
The most amusing criticism I've seen is from Daring Fireball's John Gruber who said, "About the best you could expect from Samsung without having anything to copy from Apple: overpriced, ugly, laggy UI, terrible battery life, dubious utility."
That seems harsh.