I have not been particularly impressed overall with the G5 plus camera. Sure - it takes fine casual shots in decent lighting but suffers from good shots in low light. I do not think it has optical image stabilization either. I think the key is what you mean by "decent" - it has been fine for my basic usage - candid snapshots, basic nature scenes, etc. But have not had the best results with say, close up macro shots and super clear words or details, etc.
In my opinion anyone looking for the camera as a *standout* feature on a phone should probably look at something else.