IMHO -

Anything above 500 sized is a waste of time on electrics, for the single, simple reason that the power source is a LiPo that can reasonably cost over 150-200$.

I'd rather deal with the hassle of nitro, TBH. Also, the head looks a little thin and how do you say, breakable, for something with that much spinning/crashing mass behind it.

Look at some of the metal bars near the washout/flybar cage. I would be super afraid to crash that.

BUT, that being said, I'm a sucker for new cheap toys, but I will have to decide between that and a HBKII Carbon.

Ugh, 600 size heli's are SO expensive to power. And they wreck HARD, and break stuff =/.

Also, if you want my completely honest opinion.
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You will be so much happier if you just save up and buy a Trex.

I cannot explain to you how much better they fly. I like to mess around with the Esky's because they are cheap fun, but if you have never owned a Trex, it's a truly unique experience how well they fly.

I owned 3-4 Heli's before my 450se, and about 5-6 more after, but I'm tellin' ya, sometimes I wish I had just bought another 450 or upgraded the equipment on my current one.

I do not regret any Esky purchase, ANY - the Belt and the HBKII are awesome heli's, and I'm sure the HBKII carbon will be too. But if you are going to spend 300 on a Esky that requires all the usual suspects for equipment AND a huge LiPo, I might even consider a 450sa ARF and just upgrade to CNC as you break stuff.

At 300$, you are getting out of the cheap fun range, and into "Save money for something sweet" range.