Do I need a Watt Meter? [sm=confused.gif]

I am brand new to electrics, still trying to sort thru all the confusion... trying figure all this electric stuff out...[sm=spinnyeyes.gif]
I do have Nitro experience, and am fling a second hand electric Bird-E-dog... working on a couple others

It seem to be that there are so many variables that you can't go very far in electrics without a watt meter. (such as the Astro Flight or Watt's up meter)

I'm leaning toward the watt's up meter...

I figure if it saves me from burning up one brushless motor or one battery pack... Its pretty much paid for itself.

Any advice or thoughts????

Thanks in advance!