i got it yesterday. I installed everything and I am satisfied. OpenPLi isnt good image for DM500HD because it has older drivers and remote doesnt work well with it. I put newnigma 3.0.2 which is 1.6OE image and has latest drivers. It works great. You can control speed of fan. I have it on lowest possible value. Its very quiet.
My only problem is remote. I find vu+ remote to be better.