It's hardly form fitting, perhaps some may even call it a little frumpy, but me, I call it cool (as in not hot) and comfy. Not a difficult pattern at all and the sort of thing I'm happy to pull on any day. Butterick pattern 5219.
I have another cut out but need to start trying to fit garments when sewing rather than just sewing and hoping it fits. This one could do with about 1cm off the top shoulder seams so it sits flatter, but the idea of undoing facings and adjusting is beyond me. I will try, however, with the next one to fit as I go.