[nickcw]

I have driven round the similar roundabout in Hemel Hempsted many times

https://maps.app.goo.gl/hdU8g6mS2eAv4GgRA

It looks scary, but you just treat each mini-roundabout as a normal roundabout and you'll be fine. We had some visitors from the US who weren't very used to roundabouts and they managed the magic roundabout no problem!

When traffic is heavy (common on that roundabout in peak times) you can choose which way you go round it which is useful in avoiding congestion.

Edit: I just noticed on google maps it is rated as a tourist attraction with an average rating of one star :-)

[sparsely]

There's also one in High Wycombe. https://www.google.com/maps/place/High+Wycombe,+UK/@51.62697...

[noodlesUK]

I'm more familiar with that one than the one in swindon. It looks extremely terrifying from above, but what it actually looks like from the ground is a bit of a weird run of roundabouts one after another. If you take them one at a time rather than consider the intersection as a whole, it works fairly simply. It's actually shockingly intuitive.

Compared to the nearby roundabout onto the M40, which is of a much simpler design, but is covered in traffic lights, the Wycombe magic roundabout is actually much better at moving traffic around.

[sparsely]

Handy Cross is the worst roundabout in the country, I hate it so much!