My children have really enjoyed playing with these sets, Spintronics more than Turing Tumble. Both sets are very well made and thought out, I love there is a space for everything to be put away back in the box. You can easily see if something is missing.
The included book is excellent, both kids found it engaging to follow. Some of the puzzles took some longer thought but only a couple needed adult help (or a sneak peak at the answers in the back!).
However, I almost want to knock a star off for the value on offer here. Buying pretty much every product Upper Story sells justifies a bit of bigger discount I think, and the shipping is expensive (in the UK) for what isn’t a next day service. It took a few days to be dispatched and left me wondering if they would arrive in time for Christmas or not.