Hello Charles,
I have read your post and followed all the comments. I have to use nRF24l01+ for my project. But I am facing following problems -

1. I am getting very poor range by using two modules without antenna at receiver and transmitter end. It is less than 6-7 meters for 100% accuracy.
2. Doesn't work properly when they are not in line of sight after 5 mtrs
3. I have a circuit where we have various other components. This module is interfering with the power lines of main board and causing great data loss.
4. My my project, our bots will be moving at high speed over a circular area of 10 m2, so will this module create any issue ??
5. What if the module is 80% inside a bot? Will there be data loss in that case too?

Thanks in advance