The MI6 can be boosted up to detect deeper here. It is not as sensitive along the barrel as the Carrot. When paired, the MI6 does not have a vibrate mode but it has two different interchangeable tones. However only one is active at a time. It also will go a long time between charges, long enough to forget to charge if you don't watch the startup lights. The MI6 doesn't interfere with the detector because MI6 shuts it off when in use. The only drawback here is if the target is deeper than the pinpointer can detect, you can't just pick up your detector and check, you have to turn the PP off first and then turn it on again as you dig down. Since most targets are within reach of the MI6 it is not often a problem. I have not had to send either PP back for service but I have had the Carrot almost since they came out and the MI6 for a year or two.
About the only issue to me is that if you hold a button too long on in the wrong sequence, it is possible to leave the paired mode and you will have to push the button in a a certain sequence to go back to the paired mode.
Personally, I prefer the TRX and F-Pulse to the Carrot but when using the Deus, it is always with the MI6. I don't use it with my other detectors as I would have to leave paired mode and adjust for vibrate, tone, or both and then go back to paired mode to use the Deus. It is much simpler to just grab a TRX, F-Pulse, or Carrot and I do use them all.