Interesting comparison at reddit, IMHO:

https://www.reddit.com/r/Games/comments/4y1h9i/wheres_the_no_mans_sky_we_were_sold_on_a_big_list

I stopped playing after a few hours, hoping for updates that make the game more interesting, adding some of the promised features (see above).

pavo

But it's true. The trailers (and promises) show a very different quality game than the one we got. I feel a bit scammed.

Like many others I've requested a refund.

Yep, just a duplicate of this post and that's even visible on the first page of the forum as well...