I used a heavier knit from my stash which has been there a long time, as I don't usually buy poly fabric anymore. And I had a bit less than 1.5 m., don't know why I had this small bit but it was perfect for the Rachel.
Because my fabric was heavier and pretty stable, I just followed the turn under and stitch instructions for neckline, armhole and hem. I'd either use knit stabilizer for a lighter fabric, or use one of the other options included in the pattern, a knit neckband or a turtleneck collar.
With 3 variations on the tie band and two sleeve options, plus the neckline variations, you could make a number of these without repeating yourself. It's a very quick and easy sew, with a great result. It's one of the only Jalie patterns only available in PDF because of the large and unusual shape of the front piece, but it's worth it. Definitely recommend!