Mind if I chime in? I now have a BullsEye II, a Bullseye 120mm, a Vibraprobe 570 and a Sunray for my Explorer. I may have some useful input........nah probably not.
1. Bullseye II/120: Awesome peice of equipment if it wasn't broken 90% of the time. I have litterally had 5 of the IIs and 6 of the 120s. The plastic housing is thin at the the top and one drop and they're done. Also the switch goes bad almost immediately. I did take measures to prevent this on my daughters II and so far it seems to be working. I took the unit apart and hot-glued the speaker opening so no dirt can get in. Then I ran a bead of hot glue around the inside where the pieces go together. The good news is that every time it has broken I simply mailed it in and sent $6.50 and was sent a new one. But having used this option 10 times now it seems that I could practically bought another pinpointer with that money. Sorry Whites but if you would stop using the crappy micro switch and beef up the case you would have ALL of my money for buying pinpointers. Because of all the issues that Whites KNOWS about but will NOT address I have to give the BE line a 55-60%
2. Vibraprobe 570: LOVE this one with two exceptions. One, no light. Two it causes my EX II to false. I have contacted the company about it and they have tried to help me figure this one out but nothing I do makes the situation any better. I can use it with my Deleon and my daughter's 1100 with no problems. I will say that the customer service was TOP NOTCH!!! They responded quickly and the only thing they didn't do was offer a refund which I wouldn't expect since there is nothing wrong with the pinpointer it just won't work with my Explorer II. I would have NO hesitation in buying a VB, they make good stuff!!!! I also love the holster. Even though I cannot use this one with the Explorer II and it has no light this is a solid piece of equipment. Well built, water proof, a little bulky, great holster, I give this a 90-95% ( if I could get it to work with my Explorer it would get a 99%, no light looses it 1 point)
3. The Sunray is well what can I say, a Sunray. It connects inline to the coil on my machine and it doesn't weigh too much. I find that it is sometimes too sensitive and some times it is awkward to use. The good news is that it uses your detectors electronics so if you are using a VDI machine it will tell you whatever your detector would normally tell you about the target. I have had a little problem with my Sunray being noisy once I get the Sens above 20 on my machine but if I turn it back down it works rather well. I can also tell you that I got an AWESOME deal on my Sunray from Golden Roy Boy and paid only about half what one normally costs. If you can afford a Sunray I would give it a 96-98 rating ( it also would benefit from a light wich would earn it an extra point from me. I night hunt a LOT)
So there you have it. If I can help in any way I would love to. I may sell the VB 570 but hate to take a loss since I have litterally only used it in 5 holes to try to ID the target. I have to turn the EX II off to use the thing so this isn't working out to well for me. I may just give it to my daughter.
I have also built 3 pinpointers because I love to tinker. I used a little wizard not to bad, and then two other types of stud finder type devices. I find they lack the durability and sensitivy needed for the serious detector.
I would NEVER hunt without a pinpointing probe.