The other ones are good, interesting and worth watching. Although only San Junipero is great.
Edit: Shut up and dance is great too.
I also didn't like Shut Up & Dance much. To me it felt like a weaker "White Rabbit", and much of the episode hinges on a single plot twist at the end (much like White Rabbit, but that one was better executed).
I liked San Junipero. I liked that it has a different, unexpected tone from the rest. I liked that it was kind-hearted, for a change. Haven't watched the rest of the season yet.
Just my opinions, of course.
E2 on the other hand was quite good. I did not find the SFX to be bad at all - and that itself far removed from what made the episode great.
There's nothing in Playtest that's similar to 10 Cloverfield Lane. It really has no redeeming qualities.
I watched the trailer on a flight. Looked great. Started the film.
Turns out the only action in the entire movie is what they showed in the trailer. I thought it was deathly boring.
I really think Black Mirror is suffering from the Internet hype machine. If you never saw the show and only read the buzz online you'd think the first 2 seasons were masterclass and this one was a disaster..I thoroughly enjoyed all 3 seasons and thought some episodes were stronger than others but there was no large change in quality between seasons.
It was as much as 10 minutes too long and something was wrong with the editing, like they didn't have enough good meaty shots to fill out some kind of required run time so the editor had to hold shots too long. Then there was the climactic scene where they kept repeating similar shots and beats over and over for what felt like forever, like the story's needle was dislodged and skipping. That was a mess and killed the remaining investment I had in the story. There were also several important but very flatly filmed scenes of dialog that made the acting come off as weak (I think it was the editing/shot choice and not the actors, though). My least favorite episode by far, replacing The Waldo Moment, which was then bumped one notch higher again by the soldiers/VR episode later, which had several (maybe too many) decent ideas and an interesting world but needed a couple more passes on the script.
Other four were really good. San Junipero might be my favorite episode of the series.
[EDIT] I've just checked Wikipedia and S3E1 is the only episode that Brooker didn't write or co-write, just a "story by" with the teleplay by two other people (from Parks & Rec). Maybe that's where the trouble started.
Funny: that's exactly what I think about the whole series. I have (guiltily) watched all three seasons with anticipation, and I still don't really see what the big deal is.
But then de gustibus non est disputandum, so that's just me.