I don't have a kessler jacket but I do have a format jacket from the year before that. I can assume that they improved their quality from that year.
For what its worth, it was their first year they made outerwear and the quality I got from that jacket is top notch. I ski in southern ontario and have worn it in a variety of conditions. I did opt for a large however and I am 5'6. It was comfortably fit without looking too ridiculous but large enough if you like the baggy look. Theres been 0 wear and tear so far with all the buttons, zippers etc. still working and no tears in the material as well.
Usually i ski in around -20 to -10 Celsius conditions and I wear a baselayer, long sleeve cotton shirt, t shirt then my jacket. If you're looking for a good quality jacket that is super durable, then look no further