[jasonwatkinspdx]

At least in my neighborhood I think these would be more trouble than they're worth. It's a historic neighborhood so all the houses are built up on berms from when they dug the basements cuz the streets were full of muddy manure, so every walk up to a mailbox has stairs. Unless you're agile enough to go down stairs without doing the lock/unlock dance, these would probably slow you down overall.

[post-it]

Supposedly you can easily go up/down stairs with these as the wheels lock automatically. Not sure how that works.

Edit: In the video, it looks like a heel-up-toe-down motion with your right foot locks and unlocks the wheels.

[jasonwatkinspdx]

I watched the video, which is why I called it the lock unlock dance. Note that in that video, which is obviously going to be the best looking version of it they can show, it's still a pretty significant pause in your motion, because the control is both motion and timing based. Doing that two times per house for the 10 miles or so a carrier walks is gonna get old.

[asdff]

It's probably simpler to walk up stairs with actual inline skates I expect