I have a prizm 5 and its a good coinhunter.I found with both the prizm 2 and 5 ( I,ve owned both ) that pull tabs will confuse the detector more than can slaw.They will register as nickles most everytime.One thing I dont care for about the prizms is they have a lag sometimes.Meaning when a target is found and you sweep over it repeateadly sometimes it registers and sometimes it doesnt.This is an inconsistant target and most of the time is a hot rock or garbage.That inconsistancy gets on my nerves.I,ve learned to walk away from those targets.But when the prizm hits a quarter IT SINGS DING DING DING ! and you know it.I like the prizms for a walk around the park type of detecting.