At $400, it’s not a good or bad buy - it’s not a massive investment so you can’t really go wrong.
That said, why are you considering it? I see you’re new here - Is this your entree into the world of Omega (or watches in general)? If so, that’s great and you’ll find a ton of support here, but I’d wait and read everything you can find on the forum for a little while longer, regularly scroll the WRUW thread, figure out what you want and watch the sales sections like a hawk.
Don’t jump on something just to buy.