In a few words, excellent package.

Although when you open it, the charger doesn't "catch your eye", it is fine. It looks a bit cheap but does its job without complaint. It has two lights that turn red during charging and turn green once it is complete. A big positive is that you can also use it in the car adapter and charge on the go or while traveling.

The battery life is amazing. In a 5D mark IV, it takes over 1000 shots (even with heavy use of live view).

I don't think it could get any better for this cost.

I do not see any difference from the original battery that the camera had. When it runs out, I always check to see which battery it is, and the feeling of duration is always the same. I have not noticed yet if it has an impact on burst, but it has taken 4K without any issues

For aftermarket batteries, they are very good. They have not presented any problems for me so far, and I am completely satisfied with their duration. The price of the package (2 batteries + charger) is unbeatable (around 50 €), while one equivalent genuine battery costs just under 100 €!