Considering in this hobby in one year you could dig as many as 20,000 holes, that's like a rabbit with ADHD.
Compare digging 20,000 holes and the finds you'll get and then digging 10,000 holes ann the finds you'll get.
The GPP makes retrieving those finds that quick that you'll get what could be twice the holes done to have twice the chances to find good stuff.
Its that simple...and the gpp is like getting a top of the line detector as far as pinpointing goes..yes its going to cost you and we'd all prefer it cost half the price but at the end of the day it sure beats the clump of soil passing over the coil again and again any day.
Its one expense many on here have worried about and thought about again and again and yet when they get it and see what it can do have not questioned it again.
I have hunted with someone who had a cheap pinpointer and kept asking for mine to borrow..the gpp does make others look inferior...I cant recommend it enough...your back will thank you and your finds stash will grow so much quicker