I bought a used R-Max 148 about a yearl))l ago; it had several repacks but no deployments. I was looking for a reserve at that time, and it was the only option available from a local jumper whom I knew personally, so I decided to go for it (although I had some concerns, since there is not much feedback about this canopy).
Yesterday I had a chance to test it. I was doing a 4-way belly jump, pulled at 4000 feet and had a high-speed malfunction (pilot chute in tow). I did my emergency procedures and saw the reserve canopy above me almost right away. The opening was fast and on heading.
The canopy flied well and the flare was better than I expected.
The wing load was 1.25-1.3.
This was my first malfunction so I have nothing to compare it with, but my experience with R-Max was good. I'd recommend this canopy to my friends.