I'm looking for a detector that I can use as a backup. Also, one that I can keep in my vehicle for scouting targets of opportunity that I run across. From what I have read the Ace 250 appears to be a decent detector for the money. I don't expect a $200 detector to replace my Explorer, but I don't want to buy a piece of junk either. Have any of you Explorer owners used one? If so, I'd like to hear your impression of it.