I tried it and it has been very disappointing:

- the worms are very fragile, so they must no be too cold, too hot, having not enough food or too much of it or they die

- it supposed to be able to be inside, with no fly. But having no fly requires a very balanced PH, so if you mess up, you're gonna have a bad time

- it's slow. In the summer, I eat so much fresh vegetables and fruits the worms can't keep up.

Eventually I gave up.

The 2 setup that worked for me were:

- I'm in a flat, but the gov have a composting spot for the whole street. Common in Germany, very handy.

- I'm in a house with a garden, then I just have a big pile to compost things outside, no worms required. It's simple, no-maintenance, and handle up to 10 people green trash in the summer in the source of France.