Bought Cortes new Dec. 2007, used it very frequently (3-5 times a week ,4-6 hours day ,most every week since new). Fire Service, 24 on, 48 off is how thats possible. Anyway, its an excellent machine and I'm still learning it, today I went to an area of vacant lots/ demolished homes I've hunted numerous times, at one point I was detecting a gravel (small 1/4" gravel) parking area I know I've hunted before. I went slower than normal and dug several wheat cents then tried a soft, iffy signal and it turned out to be a 1964 silver dime below the bed of gravel on top of clay base, the I.D. briefly said "sil coin cu cent" then it couldnt decide. It was fairly deep to me at about 6", most coins in the area are 1"- 3". But to make a short story longer, its a great machine, yes I would buy it again, it is lightweight, lifetime warranty, I think on the 4th set of batteries currently. EDIT: 99% of the time I hunt with sensitivity wide open (10+), no notch, disc. just below or on foil, I never have liked the SUM mode.