These are great, if all you're interested in is increased choice.
Without even getting into the quality (or lack of) of the additional programming, it usually comes at a great cost. In our area, the once beautiful HD channels have become a pixelated mess due to those precious bits being split between the HD stream and multiple SD sub-channels.
Watching sporting events has become downright painful, with the jagged little pixels so disruptive, that they're akin to glass shards assaulting the viewer's retina.
But at least we have multiple channels showing old B and C movies, long-forgotten sitcoms, and multitudes of glorious infomercials.
We loved you, local HD, too bad we barely got to know you.