My reservations about RC are the following:
1. It often has a company watermark on the back and this is rather obtrusive if it prints through.
2. FB paper can be treated with oil or wax to render it more transparent for printing through.
However, there are ways around both of these. I have used Ilford MGIV RC as a paper negative in-camera at ISO 25 and have gotten some very good shots. I scan mine though.
And, your results are excellent. So, who am I to argue with such pictures?