Absolutely awesome. Although it's obviously not a typical one-shot, it doesn't beg for continuation. But it's so good - I mean both style and the plot, pace of developing action, etc. - that I can't help but feel it'd be a waste if there's no more. Especially given that most beginnings, even those of good ffs, are either slightly boring or slightly silly... which makes the one that's not sound like a promise of a fantastic story ;). So, I hope you'll have ideas, spare time and feel like writing more! XD
[Sorry for all the mistakes I've probably made - my English still isn't as good as I'd like it to be...]