I am the guy behind the RapidMiner integration for KNIME. You might recognise the recent addition of the feedback tab on the right. It can bring you here: mindera.uservoice.com. I would love to get feedback what are your experiences/expectations regarding the usage, what would you like to see it developed. Feel free to support the ideas present with your votes, or suggest new ones (or add a usecase for an existing, like the sample workflows), or simply report a bug.
I hope you like it, but I would like to hear about the parts that you do not like too.