Does the job, but nothing more
The connection is sometimes unstable, for no apparent reason (stable 4G signal, wifi in the same room with a strong signal, etc.).
Inserting the SIM card is tricky, as the little piece of plastic is poorly guided and you have to be very careful to push it in straight: once when it was a little crooked, it 'fell' into the case. I then had a rattle. It's not easy to dismantle without fear of breaking a clip, so I ended up cutting out the ventilation grille to leave enough space for the rattle to fall out.
That said, in a region with unstable ADSL and no possibility of having fibre, I appreciate having a 4G connection at my disposal, which typically reduces the time taken for heavy downloads by a factor of 3, and speeds up uploads even more.