I have the toner for over half a year in use. So far I had seen no compatibility issues still for me was a difference in quality to the original toners. The huge price difference is significant, the last original toner have cost me 2.5 times! The delivery was fast and well packed. For questions about the accessories to another printer I have had a friendly and competent interlocutor on the phone.
Conclusion: Reasonable price, good advice and friendly staff - here I order'll be back!