If I could avoid them, I would! I am so use to hold my needles slightly under my arms-that way I could knit really fast, so circular needles and sets of double point needles are a pain for me.
But circular needles are so usefull!
This case is to save the grey vest I knitted for Jimmy just a bit too short.
To lengthen it from the shoulders would be a major job, so I decided to pull a row just above the elastic band and then carefully cast all the stitches on my circular and just go round and round (all K). I add 5 cm of stockinet stitch plus another 5 cm of a new elastic band.
And here it is a vest my Jimmy could wear again.