I had used J & J lenses for 20 years or so and now have been using daysoft lenses for 3 or 4 years now and have had no problems. When I got my eyes checked 2 years ago for specs and lenses at Vision Express, the optician was a bit iffy about me using daysoft lenses as he "didn't know anything about them" and his prescription was only for acuvue daily disposables. I continued to use daysoft using his prescription without incident.
Cue to last week and I had my 2 year check-up. The optician tested me for new specs ok but she wouldn't give me a prescription for contact lenses, despite checking my eyes thoroughly with lenses in and giving them a clean bill of health. Again, the issue was "I don't know anything about those lenses so can't test them". I have to go back for refitting of presumably J & J daily disposable lenses in the new year to get a prescription (my specs prescription is different to my contacts prescription). Once I have my new contacts' prescription I can decide whether to buy J & Js or daysofts. Daysofts are way cheaper. My eyesight has changed in the last 2 years so my old prescription is obsolete.
I would never risk my ocular health and see (no pun intended) no problem with daysoft lenses. I think there is a lot of lost revenue for the optician and presumably they have a nice relationship with the main suppliers, but competition brings prices down and I understand the guy behind daysoft was one of the people involved with main brand daily disposable development.