Here is an old demo video from 2014 using the original Leap Motion controller:
Hand tracking has improved a lot since the Leap Motion Orion update in February 2016.
However tracking accuracy might still be affected by how much your specific keyboard reflects infrared light.
A better option could be using Leapmotion in passthrough mode which shows the images of both cameras in realtime:
There should be less problems alignment problems with the new Leap Motion hardware has the two cameras are now placed in the average human interpupillary distance (IPD) of 64 mm. Much better than the 40 mm of the old Leap Motion controller hardware.