It looks like you are using an ad blocker. That's okay. Who doesn't? But without advertising revenue, we can't keep making this site awesome. Click the link below for instructions on disabling adblock.
I have been using the Marker Dukes as my go to binding for the past 4 (or 5?) seasons, and they are exactly what you think they are. A solid inbounds downhill binding with ability to take you into the slackcountry and to a lesser extent - backcountry.
Up until last year, I was using the Dukes exclusively for slack/backcountry travel and they got me everywhere I wanted to go - albeit, quite tired at the end of the day. It wasn't until last year when I got a touring set up with Dynafit's that I truly realized how bad the Dukes really are when it comes to travelling in the backcountry. The pivot point is too far forward - taking away from your stride, they are really heavy and bulky, making big climbs, breaking trail, long traverses, and big travel days a chore. I would not recommend these bindings if you are considering any extensive backcountry travel. For slackcountry though - they are still my go to, and they are, for the most part - the main binding I use inbounds as well.
Besides their downfalls for the uphill in a true backcountry setting, I have broken the Duke 4 different ways over the past 4 years. It seams like I can always find a new way to break these things. I am 6'1", 190lbs, and very aggressive on my skis so I may be the exception. I have many, many friends who have been using the Duke just as long as I have with zero problems (besides the toe riser busting, but that seams to be inevitable). So if you are tall, heavy, and aggressive - expect to break these things. The fun part? You never know how you're going to break them, every time is an adventure! hahaha. (note: I have yet to find a binding I can not break, so take this with a grain of salt)
In the end - solid inbounds/slack binding. Stay out of the park, try to find a lighter set up for big days in the backcountry. I recommend anyone with any interest in getting into touring to start with these puppies and explore your local mountains.