Thoughts on Sweeps?

Lizzie
I'm 40+4, the midwife mentioned 3 weeks ago at my appointment I would be offered the Sweep at my next appointment which is today. What are your thoughts on Sweeps? 
I was for having one but found out yesterday an old friend refused one and she was overdue. 
I've to be induced on Monday 19th (I'll be 41+3). 
Thank you.