I know I have said it and many others but the Garrett ProPointer is superior over the Fisher PP. Do not discount the Fisher PP though. It works and works well, just not as good as the Garrett. If you get one in the package and feel it may be a while before you can upgrade, use the Fisher and you will learn to count on it.
It fits in the pocket easy (try that with the Harbor Freight model), and finds targets within 2". For me that works as by the time I pinpoint the target, cut a V notch, insert the pp and VIOLA! There is the target, I can pop it out w/ fingers or use trowel to move some dirt to expose. Rescan for any other targets, recover, and move on. After a bit one can pare your digging time to brief stops many times under a minute or two.
Eventually you will want the Garrett. I do. I will keep my Fisher and it will be used by my son or wife when I get another MD.