Works great if you RTFM
For SKR v1.3, v1.4, v1.4 Turbo
Had some issues setting it up, but this was due to me installing it incorrectly. Talked with the people in the RRF for LPC/STM discord server and found that there were two issues with my install, one was that I installed my board so that one set of pins was not connected. Ended up printing some keyed connector adapters on the recommendation of the folks there. That would be the main improvement for this design, but I understand that sourcing keyed connectors is difficult. The other main issue I had was the RRF configurator was not applying my wifi config, so I had to connect to the machine and manually set it up. Once that was done it just works, and so far I am loving the RRF experience. Definitely would recommend to anyone who likes to tinker with printers and doesn't mind putting the time in, otherwise this product is not for you.
Response from Duet-SKR | March 14, 2021
Great to hear, and yeah, RRF is a little different from Marlin and can take some time to get up and running if you're not used to it. Luckily the LPC/STM RepRap project has a pretty extensive Wiki to help with basically everything. Thanks for the feedback!