I, same as OBN, have several detectors. I prefer my old Excal but have used my PI and Aquasound in other areas. If you hunt a real trasy area with a PI you will do a lot of digging for some unwanted target.To give you an example, some time back Ken and I hunted South Beach, I used an Aquasound and Ken used an Excal. While Ken dug bottle caps (32 of them) I dug 3 gold rings and no bottle caps. On our next trip Ken had purchased and Aquasound and we both got gold without a single bottle cap. If Ken had used a PI he probably would have dug over twiice the amount of bottle caps including bobby pins and other unwanted junk. In an area that is fairly trash free a PI is deadly on finding deep targets. I use different detectors for different conditions.