In the 50s or 60s the plot twists might have been unexpected. Today, they seem rather predictable.
The stories are not done badly, however. About as you'd expect from a decent but not particularly great low-budget series.
If you want great SF, this ain't it. But it's tolerable for sure.
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You may think I'm an old man, but I've only been a member since 199...
wait, you're right. I'm an old man...
It actually reminds me more of Night Gallery than The Twilight Zone. The former was and is a classic, and is still worth watching even when it misses the mark it aims for. Night Gallery was sometimes exciting, sometime cringe-worthy (ok, cringe-worthy more often than not!), but still entertaining. That last bit on the end of the last program, about the guy in the cryo-capsule who woke up in a future that didn't need him, was totally Night Gallery material, which often had short little jokes like that in between the main stories.
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"Oh, well" said Zanoni, "to pour pure water in the muddy well does but disturb the mud !"