I'm borrowing workouts from The Pete Plan
and this was the first one. Thus, I didn't think about it too much and just did it. However, I was generally ready to go with about 1:30 rest still to go. I'll probably end up tweaking it a bit, either upping the effort or decreasing the rest. Now I have a baseline reference.
I love the RP3. As far as dynamics ergs go, I've also tried the C2 dynamic, the Oartek Slider and would rank as follows: RP3 > Oartek > C2. I just don't like the feel of the C2 dynamic on either the drive or recovery. Also don't like that I sweat all over the fan, which is mounted under the seat. I don't understand that part of the design at all.
That said, the RP3 is a good bit more expensive and $ for $ the regular C2 static is a much better deal. Even if you believe that a dynamic erg is that much better than a static erg, it is hard for an average guy to rationally justify the 3x cost of the RP3. I had extra cash at the time so I just went for it.
The RP3 is very pretty in all its stainless steal. However, it is not as quiet as the C2. Some of the internal gearing of the RP3 is also not as smooth as the C2; you feel a touch more vibration in your hands.
The RP3 monitor software will dump a huge amount of detailed data (power, energy, position in stroke of max force, max force, etc, and all the derived quantities such as distance, distance/stroke, etc.) all on a stroke by stroke basis. Thus, if you really want to geek out, the RP3 will give you the numbers to do so. Mostly, I just want the pace/500m; don't have the time to dig farther than that.