What's wrong with running both stations? The batteries don't need replacement very often and are cheap.
Having a backup Vue saved my bacon yesterday during an early morning thunderstorm. I awoke to rain and rushed to close windows after which I checked to see how much we had received. My newly replaced VP2+ as of last week said 0.00", while my Vue said 0.25"! Uh-oh, I did something stupid during installation, but what?
I went downstairs where my on-line VP2+ console resides and kept pace with the Vue's rainfall report manually on the VP2+'s console over the next 2 1/2 hours until the rain stopped at 0.97". (Yeah, I know, bad OCD.) After things dried out somewhat yesterday morning I went back up to the roof (I live in a townhouse and have no access to an open yard for ISS placement) to see what was wrong.
During final assembly of my new VP2+ in my great room I apparently missed badly as I attached the rain collector to the ISS because the tipping bucket was jammed into the splash shield so it couldn't tip.
I initially suspected that the heater's 24V wire had moved up from where I had placed it behind the splash shield and caused the problem. There is a grommet near enoough to block the heater foot from the heater's tap-hole on the knock-out side of the ISS, so I used the tap-holes on the other side, but this wasn't the problem. Instead I had somehow jammed the tipping bucket into the splash shield because I didn't line things up well enough at first during my attachment of the rain collector.
I purchased the Vue as a back-up, and it did its job when needed. It remains to be seen if my new VP2+ will now correctly record rain events.