I bought something recently, and thought the seller's communication was poor and when the item arrived, it was poorly packaged - s/he was lucky it arrived undamaged. That said the item was exactly as described and arrived in good time. So I wouldn't buy again from this seller myself, but wouldn't dissuade others.
I really don't want to leave any feedback at all. Does this have any impact on the seller's ratings? I'm new-ish to eBay and don't know how this stuff looks from the seller's perspective. (Seller has already left positive feedback for me.)