I like it, but it can be fairly complex. I just published my first book A Collection of Short Stories through KDP. It has a cover creator, which can come in handy. You can go ebook or paperback. You can also opt for expanded distribution for your book to be distributed to other stores, but you make less that way because the stores make so much, then amazon makes so much, and then you make whatever is left. Amazon charges you for printing costs too. So, if you want to make money, you'd best opt for the 70% royalty. It's good if you're jst starting out or are intimidated by the thought of being turned down by a large company, or if you're just publishing a collection of short stories or poetry like I did. I've heard of D2D, which another entry covers, and I have an acct, but I'm not too sure if I'll use it. I'm a bit intimidated. But I'd check out both, see which you prefer!