Anyone using a Concept2 Model D, how steep is the learning curve?

[Thomas Martinez]

Thinking about getting a concept 2 but looking into the different ways to use them. The model D is the most common I see people talk about but the operation details is rarely discussed.
How do people actualy use these rowing machines on a daily basis? I'd imagine there's some learning curve in setting up the monitor and getting the damper to the right setting. Does it tend to be a lot or is it basically figured out right away?
Are they prone to needing any maintenance down the road? Again, they seem the simplest of all the rowing machines because they dont use magnets to provide the resistance.
What do people think about the concept 2 model D versus the others in this category out there?

 

[Shado]

Learning curve is basically zero. The monitor is intuitive after 10 minutes of playing with the PM5. Most people who should just leave it at 3-5 overthink the damper setting.

 

[Enchanting Elk]

had mine since 2017, only thing ive done is oil the chain every 50 hrs or so and brush the flywheel housing out once a year. Dead simple machine