I have seen all three seasons of United States Of Tara I do think it is exaggerated because most people have not met someone with DID. Or they have and don't realise it. Many times in real life alters are good at "acting" like the host. What good would they be if random general public could recognise a switch of personality? So in real life switching is more subtle.

Many TV programs that deal with illness either psych or hysically often sensationalize it. The goal of the show is entertainment not education which is something to keep in mind IMO

I liked wtching it. But it does get pretty "heavy" so you have to stay away if having a tough day or week.

For entertainments I enjoyed it.