With the plastic levers is carefully handle, levers should not be too much, otherwise you will soon have 2 parts in the hand ...
The tweezers and the "scalpel?" are very pliable, which speaks of no good quality, but they serve their purpose.
If you want to quickly fix something on his smartphone can strike for this low price without thinking. Who needs these tools frequently, should something pick in a higher price range already. But if you carefully handle the tools, they should also be long lasting and can repair many smartphones. For Hausbgerauch therefore sufficient.
The set is very extensive and for my purposes, it has been enough then yes (display replace the Nexus 4), only the screwdriver were just really crap.