I've had mine two weeks and have had no problems at all. No falsing, EVER. Pinpoints perfectly. I didn't pay $600 for it... but would have. It seems to be a fine machine. I can't say I've found anything extremely valuable yet, but that's my inexperience, not the equipment. I got a nice little silver (I think) kid's ring and dug some pretty deep wheaties with it, first time out.
What's the serial number on yours? Seems serial numbers starting with 505 or lower were the ones with coil "issues". Mine is 511xxxx.
Early QA issues? Yes... Best machine ever? Probably not... Junk? Definitely not, in my opinion.