How Gaynor Mindens are different!
Gaynor Minden pointe shoes are very different to traditional shoes. This clip has a very good discussion on how, and why.
Gaynor Mindens are highly controversial - dancers seem to love them or hate them, and some teachers simply won't allow their students to wear them. Yet the Royal Ballet recently adopted them as their major shoe brand. I believe a lot of the resistance is because the shoes are simply awful if badly fitted - and in the early days, many were badly fitted!
One point to note is that when changing to Mindens, most people can go back to a softer shank: if you stick with the same shank you're used to, you're likely to have difficulty rolling up through demi-pointe.
I certainly don't think it's right for teachers to oppose innovations just because they're not traditional, and I'm pleased to see more and more ballet studios starting to accept them.
Here's one user, Gillian Murphy, in her Gaynors: