I made this top in December and seeing that it is still 40-50 degrees out almost every day... I am still wearing it. Guess it is a good thing I like it! The neck is low so unless you sit up bone straight all the time and never ever bend over to hug a child... well, I just wear a black tank top underneath. Those sleeves are a real pain when it comes to washing dishes or if you don't watch what you are doing when you eat. But they look cute, right? The only pattern adjustment I made - I lengthened it a fair bit. It was quick and easy to make.
This is a great winter top and I am planning on making at least 2 more for this coming winter (I will make the sleeves narrower and I will probably be making the scoop neck version). Because the front pieces overlap - I think that the pattern would be too warm for a summer top unless you used a very lightweight knit.
I don't have a coverstitch machine, but I did the topstitching using a double needle for knits. The back side has a little zigzag and that gives it enough stretch to use on knits. Great solution if you don't have a coverstitch machine.