Great no matter what.

The suction cup is not enough school, while I took care to clean the unit for easy grip.
After battling a quarter of an hour with this sucker. The plastic hook broke trying to open the screen (fluke, the seller has two, he has confidence in his equipment).

Second surprise, screwdrivers in the kit are the same ... it's a shame, the screws are different! Have to go get another one screwdriver.
The second plastic hook did not move one iota battery before breaking into the phone. Very practical to remove the pieces after.
Comes in the plastic triangle, practicality, it has three peaks that could break one by one without being able to dislodge the battery.
I eventually managed to take off the battery with the pick (yes, yes, a pick, thank you for my guitar) and remains of a plastic hook.

In short, do not risk breaking your phone to several hundred dollars saving a few cents on your tools. I'd not take twice.