for those of you using MOCA, what kind of bandwidth do you get? And what kit would you recommend?

I ask, as my brother-in-law just finished a house where he had asked the contractor to put in internet cabling everywhere, and... drum roll... yes the contractor put in coax everywhere. I tried powerline adapters, but could only get ~30-40mbps (he has a 1gbps fiber connection from the ISP) over them.