Good.
In a one-handed strike, there is lesser force involved, however it gives the user, the freedom to cover a wider range. This keeps the other hand free, which gives the chance to the user to use any other attack simultaneously with the other hand, like Chidori or Rasengan(one handed). They're quite good for quick slashes.
Two handed strikes have obviously a greater force involved, and are good for defending against attacks. Also, they have more body weight involved, so it's quite a risk for the user if the strike misses, the massive force applied causes him to fall towards the ground due to the gravitational force. And, the user doesn't have the other hand free, i.e. both the hands are occupied. Great for cleaving off any body part or to inflict heavy damage upon the opponent.
Any questions?