We were in 2 different co-working spaces when we started & there were only two things I found made one better than the other: 1) location and 2) the other people using the space. Every other perk or annoyance was very secondary to these two things.
If I had to rank location or people, I think people were more important (but do not discount the location).
If I were looking for a new space to work in, I'd try to network into it rather than search for it directly and judge what I saw from a single visit.
I wouldn't worry about their coffee or printing capabilities or the cost (unless it's way too high I guess). These have no impact relative to your ability to get into your office without too much hassle and be surrounded by people you respect who quietly work hard, independently. I wouldn't worry about what people were working on too much.