Well, I’ve studied the reviews, checked page count (I don’t want to buy high school pocket book size by accident) and basically gone for a recognised Name, Oxford. I’ve bought the Concise Oxford English Dictionary for those times I’m not online (actually quite often) and need to look up a word. I’ll let you know if this blind trust in a Name is justified when it arrives.
And no, I wasn’t writing without any dictionary at all–the two English ones currently in the house are either old (we’re talking decades, oops) or really, really concise (high school level).