I will humor you.
I have owned the following marker bindings:
M12
M14
M20
Jester
Jester demo
Duke
Jester Schizo
The first pair I ever owned were the M12s, they came with a pair of skis I bought from a shop. I broke them within the first month of the ski season, the toe piece exploded.
I took them to the shop and they put a pair of M14s on. After constant pre-release problems the heel piece exploded on those. When I took them back they just gave me a pair of PX14s (I love those).
I swore off the brand at this point, and got rid of the M20s that were on my GS skis.
When the new style of Marker bindings came out, I was skeptical, but bought a pair of skis that came with Jester Demo bindings, again from a shop. After about 40 days of skiing I snapped the toe piece completely off, and was sent into an extremely dangerous tomahawk through some small cliffs and rocks.
When I took them to the shop they said they could technically warranty the demos and they gave me the schizos. By the end of the season I had sheared the cable connection off of the toe piece. I sent them to marker directly as this was a known issue, and asked for a "downgrade" to the Jesters. That pair of Jesters lasted almost a whole season, and then I finally broke the toe piece off again.
The dukes I owned I hated, They ski very poorly compared to alpine bindings, and tour as badly as any other non tech binding, and yes, I eventually broke them as well, The two bars connecting heel to toe snapped mid tour, and I had to ski down on one ski with the other on my pack... not easy in the BC.
The reason that Marker bindings are terrible is mostly due to their design. The newer bindings have a very small shear area under the toe spring housing, With repeated stress and temperature fluctuations, its bound to fail eventually.
P.S. their warranty service is great, which is good since their bindings are so fragile. Also, I really liked how the Jesters skied, but I feel the same about the Rossignol bindings, and they have far fewer durability problems.