I purchased a BCD436HP and I'm awaiting its arrival later this week. After my purchase, I found this forum and AZ discussion group and I'm questioning my purchase. I've had many scanners over the years starting with a Realistic 4 channel crystal unit that I purchased at Radio Shack. I bought the 436 for the zipcode programming feature. After reading some of the comments regarding the challenges in this area picking up signals, did I waste my money? Any advice and direction would be very much appreciated.