Love my sleeved jumpers!
I own three of these in burgundy, forest, and espresso and I love them so much! I can't wear them in the hottest parts of summer, but rest assured, they will make their return to my rotation as soon as the weather cools just a bit lol. I have nursed two babies in mine, and have found that the necklines have not stretched out or lost their shape even with the frequent up and down, which is amazing.
My one grudge is that, while the fabric hasn't pilled per-se, it has developed a bit of a fuzzy quality over time. I only wash every third wear (unless I'm, like, really sweating or getting dirty or something), and I always wash delicate or hand wash, then air dry. The fuzzy look of the fabric won't keep me from wearing them, but it definitely takes away from the clean, smooth look the jumpers originally possessed. Where I may have worn them out to dinner or something originally, they've been relegated to casual, daytime wear only now that they're showing wear.
Again though, I do love them and intend to wear them until they fall apart, so definitely a great investment overall!