I've had these jeans for over 18 months now and honestly don't wear them a lot. I find the sizing really odd. I'm 73kg and usually a size 12 with a 30" waist and other L&Y jeans in this size fit me well.
The waist on these however is tiny (measured at just under 28") and very tight. However they are big through the hips and thighs. I don't find them at all flattering to wear and they make me look chunkier than I am, hence rarely wearing them.
They are good quality thick denim however, a good fit in leg length (I wear mine rolled up) and I'm 168cm, but I really dislike the lack of back pockets.
If you have a small waist but proportionally much larger hips, then these might work for you. I often size down in L&Y but In this case I probably should have sized up!