Got the large version so can't say if the medium is any easier to take but looking at the measurements it doubt it would be much different.
I have used and had used on me a couple speculums in the past, all of which have only expanded in one way this one opens 2 ways which adds a new dimension to the play.
Overall the quality seems very good and well put together. Even with lubey fingers I was still able to adjust the screws to keep the toy at the size i wanted.
Great Product, Perfect for all your Anal needs.