The grip fits very good and gives a good balance with larger lenses on the small X-T100. My only complaint is, that the screw for attaching the camera body is slightly too long. So the grip remains loose and moves a bit. My workaround was to use another screw (from another grip). Now it’s perfect.
Without this problem I would have given 5 ***** for sure.
On the other hand I want to add a correction of what Kenneth Tupper reviewed: At least my copy has a wonderful thread for a tripod, which is perfectly centered under the lens (on the X-T100’s body itself the thread is off-center).