Wahoo Kickr Rollr

Anyone using a Wahoo Kickr Rollr?. I’m at the start of my indoor training and bought one second hand recently. I am finding the Erg Mode is OK up until a point but quite problematic with more intense/complex work such as overs and unders and RAMP test are done. I have started to use resistance mode instead and am presently experimenting with the setting value for me to do a RAMP in resistance mode. Anyone care to share their experience if my experience is similar to theirs?

I don’t have one, but DC Rainmaker’s review cited erg mode as a miss.