Said this in many past threads about pinpointers, I use two in the field, the TRX and the F-Pulse. It took a while to "make" a good F-Pulse. Fisher dropped the ball in quality control, but once I made mine good with a tad of re-desigh...it really is a very good pointer.
I like the TRX for it's deeper detection but the F-Pulse's 360 degree detection reigns supreme over the TRX. The TRX in tandem with the F-Pulse, is killer. It comes out anytime my Pulse is silent after digging a 4" hole, looking for a detected signal of 4-6 inches. Pre dig detection with the TRX, using the flashlight beam, definitely pin points deeper. Only thing is, once out of the hole, that tip-only kinda sucks, so I use both.