Imagine a lazy evening at a pub, after everybody's had a few and the fiddler got tired, and the annoying dancing couple retired to a corner, and then some sailor starts telling stories, and they're wild and entertaining and fun, and when sharks get punched in the face, it's always justified by the narrative, but you just *know* he's bullshiting you (for once, because you knew fisherman Will all your life and he's never been to open sea). But you're still having fun, right? So you could just skip the noisy pub thing and read a book of Sheckley's short stories instead.
They're really cool, but for all their worth, they never feel like perfect short stories - you know, the ones that dazzle you with an interesting premise, introduce adorable characters, make you really interested all the way, and then drop a completely unexpected ending on your poor excited head. They *almost* pull it off, and then you reach the ending and realize that what I described was never planned in the first place, and the core idea behind the story is a bit silly, but still nice, and not really ehh even, but not too nice, and it's all kind of underwhelming, but probably still worth it, but not entirely, and, you know. Good but not too good.
Still, what Sheckley does well is aliens - they really feel like weird species, with strange needs and understandable desires, and not like cartoon aliens in the most of sci-fi who are clearly one human who just puts on some strange costumes to pretend they're from different planets.
What else Sheckley does well is humour - he makes you chuckle hardly any less sincerely than when you laugh while reading Pratchett.
There were two stories where POV changed between two opposing parties, and it was accomplished very skillfully. There was a really cute story that didn't claim to be in any way serious, but pulled off a silly premise with such passion, that I can't describe it in any other way than adorable and applauds-inducing - I'm talking about you, Citizen in Space. Skulking Permit was a bit naive, but still very cute, Something for Nothing turned out to be very cynical, and A Ticket to Tranai ended in such a way that made me hate the world for a while - or at least a part of it that was a certain sci-fi writer for the good part of the XX century, and now is probably some ashes? The Mountain Without a Name satrted with a cool premise, but ended with a puff, a Thief in Time was a genuinely intriguing bag of surprises. There were some niceish stories that felt like they were there just for filling space, too, but they were very short, and it was entirely ok.
So whatever. Don't read it if you want. Ignore the advice of your grandma who said you had to read it, meet your old friend from the future who says that it's necessary for you to read it and still don't read it, ignore my positive review, ignore your gut feeling, ignore all the billions of alien races who can't be wrong. Just be smart, don't trust big red buttons, don't punch robots, don't touch alien ships and don't forget to have fun in the process.