I was completely sold on those top-mount brake levers on the Cross Check in the first ten seconds this morning.
Going down my eroded dirt and gravel driveway, I wanted to slow down to check for approaching traffic before pulling out. Intuitively, I used the iterrupter lever on the front brake, as if I'd always had it. Perfect.
Later, in town, I rode in the multi-variable environment on Main Street with my hands on the top levers. I could see better than when I'm more extended on the hoods and I could stop instantly for darting pedestrians or other sudden intrusions.
Out on the road I could tell the levers were there, but never felt they interfered with any of my favorite cruising positions.
I would not slap them on any bike, but they're perfect for this one. Setting them wide the way I did leaves room for light and handlebar-bag brackets whenever I might add them. If I transfer the multi-gear setup to the Traveler's Check for a trip that might call for it everything will work just as well.