I've found Lulu to be decent quality, much better than other print on demand books like Lightning Source (used by O'Reilly). But they are only a printer/binder and can't correct typesetting problems (well, I suppose they could help or reject them, but I guess they don't).
Yup. They have a lot of resources available on how to do it but what gets printed is 100% the author's (or publisher's) responsibility.