Hi Bugler. I have been using the Axiom now for over 8 months and I am very happy with it, so much so I have not used any of my other detectors since purchasing it, I have had no need to. The terrain I mostly hunt is rugged hill sides full of brush and the connecting gullies, so my main coils I use are the 11in. mono and the 11in focused core DD, the larger coils are great when ground conditions allow. The mono coils have incredible edge sensitivity in my opinion, making target pinpointing and recovery very easy with a little practice and it is nice when working in tight areas around boulders, under brush, bedrock crevices etc. The DD coils are less affected by ground mineralization and are very sensitive at the center of the coil due to the focused core design which make them a killer on very small gold and unfortunately small bits of rubbish also lol. Start with the factory settings and adjust them as needed, be sure to noise cancel as needed and ground balance often if you are in fixed, don't be afraid to turn the sensitivity down to 3 while you learn your machine, she is still very sensitive at that setting. I hope this helps. there is a little learning curve but not nearly as bad as some detectors out there. The pic is of some gold I have found lately. Best of luck and happy hunting.