Lifestyles: how's your experience?

I got the close-knit lifestyle for two of my Sims. One of them is an actor and she soon got the tense +5 moodlet, which effectively blocked her from any progress in the acting career and whatever I did, it just wouldn't leave. So I turned off lifestyles for the time being.

I wish there was more information on how they work and what to do in these type of situations.