Very disappointing 129

We wanted to try these cartridges that are really cheaper than brand cartridges for reasons of economy. Unfortunately, we did not do economics as we had to buy more cartridges fast enough because:
- These cartridges have toner powder throughout our printer,
- They have left traces "ink" on printed sheets worse than inkjet who would not dry quickly,
- The colors are blades or no visible color on the screen (eg a purple desired color will be printed in pink)
- Finally fine features (such as arrows, braces or features in openoffice) are not even visible in print.

Therefore we are really disappointed with this product and we do not recommend it