The provision as worded offers some guarantees. For instance, the prosecution and the defence must consent to this stay in sentencing.
The advantage of this system and its effectiveness is related to the fact that when judges postpone sentencing, they give the accused a chance, but at the same time, they have a sword of Damocles suspended over the accused's head. Indeed, if the accused does not comply with the treatment or does not behave properly, when he appears before the Court for sentencing, the judge may take these factors into account. The judge can tell the accused that he gave him a chance, but that the accused missed his chance and in theory the judge could, in theory, impose a harsher sentence.
This is different from imposing treatment on an accused in the course of his probation. When probation is ordered, the judge is no longer seized of the case because he imposed the sentence. To some extent, the accused has more freedom. He no longer has this sword of Damocles hanging over his head.