Once you have them trained to respond to the inconspicuous "virbrate/buzz" on the collar which is very quiet compared to whistling and yelling letting everything within 1000 yards know you are there, it's a nice feature. I have the remote beeper with my G2 also and love it. I have only ever used the "nick" feature once (I'm lucky). The other features are great. I highly recommend the TRI-TRONICS brand for those features. Ohhhh, and the range is up to a mile+. Training them to the Vibrate/Buzz feature is also great when it gets windy. The collar is always right there!
ALWAYS TEST THE SHOCK LEVEL ON YOUR WRIST FIRST!!! If you can't take it, don't ever try it on your four legged pal.
These are just my observations.
Good luck