In my experience in both RV service and sales, as well as being an RV enthusiast, my vote is not bother with spending the money. Yes, it makes it easier, so if physically it's difficult for you to crank up and down, by all means, go electric. But if it's not all too hard, avoid it. But then I'm old school. Electric is nice for convenience, but too many things can go wrong. If you over extend, the shear pin snaps and you're having to crank it manually anyway. Then there is the draw on the battery. And if you lose power, you're cranking again.
Just my .02