I've never worked with polyester yarn before, and I initially found it coarse (but this was straight after working with a delicate baby yarn), but it does create a warm and sturdy blanket. I used a 4.5mm crochet hook because the yarn felt thicker than an 8 ply yarn.
Much to my chagrin, I'm still unable to chain correctly even though this was my 13th crochet blanket! Rather than chaining 150 stitches of various tensions, I joined granny squares together instead. Being Chinese, I had to have 8 colours so I added "beige" but it looks more grey to me.
Each end of the blanket consists of 8 granny squares joined together using this great method by Bella Coco and I followed Happy Berry Crochet for the flowers. Each stripe of colour consists of 6 rows separated by 2 rows of white yarn. I finished this blanket towards the end of May, and will wait for warmer weather so I can wash and reshape it.