Looks very promising.
The principle of this idea is similar to the less hygienic circumstances under which humanity evolved. Back then, it was quite normal to transfer fecal bacteria between members of the same tribe.
Though this therapy is promising, I understand that it’s not yet ready for mainstream application, because the risks aren’t well known yet. Therefore, it will take a while to assess the risks. Only after knowing the risks can we decide when this therapy is a good solution, and when it would do more harm than good.