+ Fair price / performance ratio
+ Battery performance comparable to the original
- Not quite matching, more yellowish color (not due to the fading / yellowing over time, design flaws)
- Hard plastic "feet" instead of the original rubber
- Battery indicator / LEDs easily installed, light shines through the plastic through, halos
- Installed a lot of plastic where the original on aluminum sets
Conclusion: For whom the appearance of the underside is not important, which can access here quietly. My Macbook is already a tool and also looks accordingly. Who Apple products has, however, bought from lifestyle and design reasons, is better off with the original.