Well... I have used these pinpointers & here are my opinions....
sunray inline probe
.... XL model for the whites XLT...... works well unless you use "hot programs" which is what I use almost exclusively.... so quite useless for me. I tried the one for the explorer & it worked extremely well & was very impressed with it.
the vibraprobe (the red,black & grey model)
... people often RAVE about the vibraprobe.... and it IS an excellent product, however it interferes with my whites XLT something fierce & I just absolutely HATE the automatic on/off switch (so much so that I made an OFF switch for it so I didnt have to WAIT for the darned thing to turn off by itself). ANother annoying thing is that it would turn off by itself after setting it aside while digging & I'd have to hold it upright to turn it on again....and I'd often forget to do so. VERY annoying. Its also just too long for me. I dont need a pinpointer THAT long. However it is waterproof & VERY solidly built (cant say that about most pinpointers). A lot of people love it, however it just doesnt work well for me, but I keep it as my backup pinpointer)
The automax
.... a friend had this & I used it for a few hunts..... WAY too long/unwieldy for me & I just didnt like it.
the new whites bullseye pinpointer
..... meh.... it works ok, but the switch has a tendancy to stop working after a while..... best to replace it with a toggle or a pushbutton. I also do not like the adjustment knob on it... it moves too easily & gets accidentally moved when in use.
the old white's bullseye pinpointer [ the old black boxy kind with rubber toggle switch (or pushbutton)]
..... I have used this one the longest & have found it to be my favorite.... the rubber switch cover will eventually tear off so i replaced the switch with a simple toggle switch, replaced the green LED with a white one so it can be used as a tiny flashlight, added a belt clip off of an old tape measure so I could clip it onto my jeans pocket. The only problems I have had with it is that it can sometimes false if banged on something if the sensitivity is turned too far up (I keep it down so it doesnt false). I liked the thing so much that when it was discontinued... i bought another just in case my old one gave out. Since 1999 I have used it & its still going strong.
Note: the sherlock looks VERY interesting! I have yet to try it. I LOVE the grip indentions on the case ..... wish my old whites bullseye had those!