As with any thematic anthology, there's something for everyone here, but it's also doubtful each and every short story contained in it will appeal to every reader. I, personally, found Summer Lovin', Summer Bummer and Catfish Crisis (in this order) to be the most enjoyable for the most part, with Summer Camp and very possibly Fandom following soon after. That said, no comic here is perfect or even outstanding - they're just funny little shorts you read, laugh a minute and move on, forgetting everything you've just read. That's usually the nature of anthologies.

Summer Lovin' is a decent silver age Superman story touching the subject of Turing's famous test, and is probably the only story here that made me feel something. Even if Legionnaires don't serve any real purpose in it, it was nice to see them in something written by someone else than Brian Michael Bendis.
Summer Bummer is a lighthearted tale of friendship, containing the message of accepting each other's differences. It doesn't overpromise, it doesn't overstay its welcome - it is exactly what you think it may be, and it works. It just works.
Catfish Crisis and Fandom are bizarre and clearly intended to make you laugh, if you have enough distance to comics to approach them with open mind.
And finally, Summer Camp - probably the most conventional story in the book, pretty predictable and straight forward, but it does tell what it wants, which is the importance of putting your family before your job, as well as never judging a book by its cover.

The rest was a mixed bag to ME, which doesn't mean YOU won't find value there. As I said earlier - anthologies tend to contain diverse material, and it really comes down to the reader to determine what appeals to them the most. To me, overall, Cybernetic Summer is... okay, I guess. Nothing special, nothing super inventive, nor especially memorable, but nonetheless it can be fun.