It depends on how close the sisters are to each other. I've seen this situation happen and seen very bad blood coming out of it, because the sisters would get jealous of one another, and compare things like who has a better lifestyle etc; not highly recommended.
not recommended at all. doesn't matter how educated those couples are. ive seen 2 sisters (doctors) getting married to brothers who also happen to be doctors. not good
one couple gets in an argument/clash, the other couple gets the dirty mud on them. vice versa.
and i agree with one poster, it could very well lead to an "ijtimai" divorce.
I dont recommend it unless every party is well aware of their responsibilities and doesnt allow the other people involved to get mud on them. Meaning, dont complain to your sister or brother about your wife/husband knowing full well they will go home and fight with their spouse about it.
my 2 phupoos r like dawarani and jethani lol and they r soo happy MA... and whnevr i look at emmmm it feelss soo gud... but i dunnoo if i will consider it or not personally...