The QL-560 is actually a good label printer. Unfortunately, the post office has to 1.1.2014 the labels that produced the Internet brand changed. Namely, in various mission types (eg registered mail) is printed a 1D bar code (bar) with on the label, which is not readable in the postal branch / agency. The technical support of the Post advises that one should in the printer driver from "speed takes precedence" on "Quality takes precedence" switch. The barcode is then a bit better, but the gaps are still so thin that the barcode is not readable.
Anyone who uses the Internet for brand shipments (bar) Barcode, should rather pick up the QL-570. This prints much cleaner with the above setting and 300x600 dpi.