I got a pretty decent deal on one and couldn't pass it up. So far it's been better for me than my Silver uMax was (I know, heresy) and I'm not entirely convinced that it's not as good as the ACE I've been using as of late. I really can't say anything bad about it except the battery arrangement! It gets dogged out a lot as not being deep-maybe there are others deeper, but I've had plenty of finds that my digger would almost completely disappear into the hole! I've found a gold necklace with mine, silver coins, washers, enough clad to keep me interested, and some cool relics to boot. I've discovered that on tot lots I can get very close to poles-the threshold rises, but if you pass over a target you still get a blip! The DD coil does pretty well in the trashy old homesites I've hunted, the discrimination works well, and if I get tired I can hip mount it!
It IS susceptible to EMI-very much so. However, you get used to that and can usually tell the good targets from the interference. Certainly there are places where it's just annoying as heck, but in general I don't have any real trouble with mine. The output is mono, so I got a 1/4 to 1/8 adapter, some cheap earbud type headphones, and clipped the useless earbud off. Some of the places I hunt need one eye and one ear to be open anyway, so this isn't a problem for me either.
For $70 it won't take any time to pay for itself either!!