One of my absolute favourites!  Herringbone makes the most beautiful fabric which is interesting on both sides.  Because of the way you knit it, it is almost double thickness and incredibly squishy!

I have made several throws using herringbone... the stitch is slow to do, but not at all difficult and has the advantage that the rows are very high so grows reasonably quickly!

Whatever yarn you are using, I'd recommend using a needle double the size normally recommended, so if it's 10mm use 20mm for the herringbone.