My sons visited last month and were highly impressed - see here For people based in England, I'd mention that my boys made the trip comfortably in a single day, flying out to Zurich at 06.00 from Heathrow, and arriving back at 19.30, so not even much of an expense as no overnight hotel costs. And the hospitality and catering at the Museum/Factory is excellent. I'm sure anyone's liking for the Omega brand would be enhanced by a visit.
Definitely worth a visit. Read my report here : https://omegaforums.net/threads/the-new-omega-museum.98430/ I live not even 30 minutes away from Omega Bienne, always up for a coffee or a beer if my schedule allows it