Take a couple weeks to play with it, then take it to some places with heavy iron infestation.
Don't know what machines you have used in the past, but iron ridden places that can make you crazy with other machines become ho-hum. If you get out much, a month from now, you'll be saying "I can't believe this thing saw that target in this trash".
If you get an iffy target in iron, use the PP to make sure it is not the edge of a large piece of iron. If there are two high point readings, center over each and do a short swing and then @ 90deg. You'll be amazed, as my old buddy Justin Wilson used to say, "I garanteeee!"
10 days or so ago I pulled a wheatie co-located with a rusty 2 inch flatwasher down around 8 inches in wet beach sand. There were no other targets nearby, and the Excel was showing positive and negative, and this had been missed by a CZ, Tejon, BH QDII, StingrayII. I'm still shaking my head. By the way the washer came up first and thought I was fooled, nope the Excel was right.
And a warning, the little sucker becomes addictive, you want to reach for every time and leave the other machines to home. Not a good thing since you lose your chops with the other machines.
HH
BarnacleBIll