I generally don't reply to rejections, even personal ones, because I'm under the impression that editors would prefer not to have their in-boxes cluttered with such things. (Not to mention, it doesn't quite seem professional.)

But just this morning I opened my e-mail to find the most extensive and helpful personal rejection I've ever received. Around 500 words of critique from the editor, with an offer to reconsider my piece if I should choose to make the changes that were suggested. (All of which will obviously make the story better...even if I do tremble a bit at the thought of such an overhaul.)

I think in this case, a thank-you for their taking so much time to offer constructive criticism is in order. Is there any reason I shouldn't send a brief reply?

Thanks in advance for your experience!