Renting to a young couple - any pitfalls?

[Jorge Galvez]

Are there any issues anyone has experienced with renting to a young married couple.  Guy is 24 and girl is 20. Guy has an associate's degree and works two jobs. Girl works two jobs. Mom would like to move in with them as well. Combined income meets requirements. Well spoken and appear reliable during the interview.  They have gone above and beyond to show interest and demonstrate that they could be good tenants.   Just wondering what kind of pitfalls to look out.   Any advice?