Most users consider Krnl exploit a virus and ask if using it is a good idea. There is no easy answer for this. The exploit can access certain features on a device that might otherwise be locked down. On the other hand, using the Krnl exploit can also open up your device to security risks.
In particular, if you don't use the exploit properly, it will allow malicious individuals to access your device and data. As such, it is important that you weigh the pros and cons of Krnl download before deciding whether or not it is right for you.