I've been flying mine a little over a month with "E" power...
I have an AXi 4120/14 which is virtually identical to the recommended E-Flite Power 46...

The AUW is 5 lb. 9 oz. with a Kokam 4S1P 3200, a Phoenix 80 ESC and a Koolflight UBEC.
Radio is a Hitec 555 rx. and 4) Futaba 3004's

With an APC 13 X 8E I get about 700 Watts / 55 Amps, and a 20' take-off roll...with a vertical climb out to about 150' or so...(hardly "anemic" )

If you figure the cost of the batteries as sort of like buying a whole seasons worth of fuel at the outset, then it doesn't cost much more than putting a .46-.50 2 stroke in it, and if you figure the cost of a Saito .72-.82 the cost difference is not much at all...

It's one of (if not the ) easiest builds I've ever encountered. Everything went together with no problems...
It flys beautifully...nice and smooth, like a sport/pattern type and will do just about anything you want in that respect. It knife edges quite well, with very little roll couple w/ rudder (proverse ) and just the slightest tuck to the belly.

It glides excellently, probably due to a very clean cowl (no engine sticking out in the breeze ) and despite the fact that I left the wheel pants off. I have to pull the power all the way off on the down wind leg to get 'er to slow down enough on final...

Only complaint I have is changing the battery pack...
Due to the fact I have an AXi, I had to space the motor out a little more to get the cowl/spinner in the right place. Consequently, it's a little nose heavy unless I shift the battery waaayyy back, so I have to remove the wing every time I change the pack.
It's not enough to really bug me though...because it's such a nice flying airplane...and I get positive comments from everyone who sees it fly