I bought this specific toner twice. The printer I have is a Brother MFC l2750dw. The first time it recognized it as a non-genuine toner, it measured the ink levels, with good print quality until the middle, as it printed with poor quality afterwards, so I had to replace it. The second time, it didn't recognize it, it gave me the indication to replace it, so I couldn't print. The problem was easily solved by searching for instructions on the internet on how to manually disable the toner recognition. Now I print normally, it just doesn't have the ability to recognize the ink levels. The print quality is good for now. I can't know about the lifespan because I just installed it. In conclusion, I consider it worth its money, as it is very economical. I would buy it again even with the problems I mentioned above.