Extremely stable. The slippers came on time. but order 1/2 to a full size down. This is a very common problem, if you do a google search you will see it. These shoes give the look of a bit of a heel, while the platform at the front makes it easy on the back. The details are astonishing & so the research was clearly extensive. Any questions regarding about this item, please leave a comment and Ill try to get back to you ASAP. but be warned, they look like they were made by hand by a dead-beat nobody that hates the world and half-azzes everything. Case snaps open and closed firmly. not a huge deal but I definitely expected more from Sennheiser.