We have a choice of commercial content providers (channels) in addition to the public service channels; this wasn't the case in the early days of Danish television, however.
The public service SD channels generally have a significantly better picture quality than most of the commercial SD channels. I cannot comment on how the HD channels compare, as I currently only have one HD channel.
The ways of avoiding those pesky commercials are rapidly shrinking, as many settop recorders have commercial skipping disabled, and there are almost no digital cable-tv recorders on the market except those tied to a certain cable-tv network. :doh: