I was so excited to ditch the plastic bottle chemical dish soap for this bar! It's surprising effective, even with grease, whether I'm using Simply Zero's brush or a dish rag. The only downside is that both times we've gotten it it's broken oncehalf gone, making it harder to swipe your brush or rag against the smaller pieces. This could be due to the fact that we rub along the top of it making it weaker in the middle, but I'm not sure how to easily use this another way. Other than that it's great!