The Shuriken is a lightweight weapon, so it's useful for those who like to use their powers regularly. Its main strengths are its six-round bursts, which allow it to do serious damage at close range if most of the shots are to the head. It also has a reasonable accuracy level at close range, has a fast burst fire rate, and moderate rate of fire overall.
If the Shuriken is not used in cover, its recoil is quite high, meaning you could miss several shots in a burst if not adequately aimed.
However, the Shuriken is surprisingly accurate when fired from cover, allowing for a full burst of headshots at short to medium ranges.
One of its major weaknesses is its low damage level. This can make it difficult to employ on higher difficulties.
The Shuriken can be combined with Ultralight Materials to reduce its weight down to a minimum of 2% weight. This can allow another lighter weapon to be combined with it such as the Disciple, Avenger or Katana and still maintain a high level of power usage.
The Shuriken has a faster reload speed than other SMGs, meaning you can get back into the fight with minimal down time.
The high recoil of the Shuriken can be negated if playing as a Turian Sentinel and evolving the Turian Veteran power to reduce recoil. This means that it is possible to get all six shots on the head of a target without much difficulty at medium range, allowing for much faster kills at that range.