First, my own PSA. (Matt or Mods) Edit out the Google tracking in the OP link. Everything after the “&” in links is The Man tracking you and anyone who clicks your link.
Most people who post links are guilty of this and it’s bad. Data brokers are watching every click. Don’t give them more data. Anytime you search on Amazon or Google, they generally add a unique click ID to the end of the product web address. Look for &cid= or &gid= or &gclk= or &clkid= in a web address followed by a jibberish string of letters and numbers, and delete everything after the “&” before sharing the link. You can verify the cleaned link still works before posting.</p>
Here is the clean link with crap removed
https://www.decathlon.com/products/forclaz-mt100-hooded-down-puffer-jacket-167571?variant=31481796165694
As for the jacket, This is the well known and now time tested alternative to the MH GW. its a fraction of the price for only a 3-4oz weight penalty (but more durable fabric) so really it’s close to a wash overall.
Also their Trek 900 box baffle jacket is only like $160. That is on par with a MB Alpine warmth wise for about 20oz.
Decathalon is generally a great brand when you don’t want to spend a ton but want medium-light gear. Their price to performance can only be beat by used gear.