User Activity

I'm considering buying the EOS 5 camera. So far very impressed wioth info availabl;e on the internet. Are there any new users and what are the experiences. Opinions and experience of others will help me to make decision.Thanks
Currently with my Canon D7 I'm using Lightroom 3 to work on my pictures. Mainly shooting in RAW format CR2.I understand that with the new Canon EOS M5  shooting RAW it will not work to download to Lightroom.Any known solution? 
Is the Canon flask 580 EXII compatible with mirorless Canon Camera  EOS M5?