I have several ESEEs including a RAT-3 and a few Izula IIs. I think they're really good knives. They take a good edge and hold it well. Obviously personal preference & environment will dictate the proper size. I'd imagine that a knife that large would be a waste in the desert, but the extra size is handy if batonning wood is a survival task you anticipate needing to do (although to be fair there probably aren't a lot of times you'd literally perish if you couldn't baton).

I agree with one comment made about serrations; to be really practical they should be the middle, not right back at the choil/guard area. But yeah, most people would find it odd looking so it won't happen.