I'm really quite happy with it and far prefer it to a C2. The software is pretty decent too and the force curve in particular is quite useful to help you figure out how to connect all three motions smoothly for mostly consistent even power.
Family and friends that have used it have struggled with getting started with it but mainly because they've learned such bad form from static machines like the C2. But near as I can tell that will happen with anyone used to a static rower that's never been on the water or coached on proper form.
Do you feel like the RP3 teaches proper form, for someone who hasn't had coaching or been on the water?
A drawback of the Oartec is that the display is rudimentary. It'll show you speed/distance, watts, or cal/hr, and that's it.
While I don't know how to make a machine that promote the following without putting telemetry in the handle, I also coach people using my machine to row with a D-shaped motion that mimics taking the blade out of the water and almost scraping the top of your knees on the return. The goal is to force people to mostly return the handles with their forearms and torso before collapsing their knees.
The RP3 display is definitely something worth trying out. It's not perfect, but I really like it. Contact the US distributor and he might be able to put you in contact with someone local to you that has one.
I don't see why not. My RP3 uses any Android tablet. I have like a 7-8" tablet in there, but there is no reason I couldn't put a much larger tablet like an 18.4" Galaxy View.