We have seen the Barefoot 3 controller that AMD used in their first SSD before in OCZ's Vector 150, but not exactly like this.  The controller has been optimized to work with Toshiba's 19nm and is clocked slightly higher than the Vertex, though AMD will not say by how much.  That may account for the reduction in daily writes to 30GB/day and the warranty period to 4 years but as it is OCZ that is handling the warranty it is hard to determine the exact reasoning at this point.  On the plus side the MSRP is also reduced by $28 to $164 which still falls short of reaching the magic $0.50/GB mark.  The Tech Report tested the 240GB model here, as with other SSDs you can expect the 120GB to be slightly slower and the 480GB model to perform slightly faster.

"AMD is getting into the storage business. The Radeon R7 SSD combines OCZ's Barefoot 3 controller with Toshiba's 19-nm MLC NAND, custom firmware, and a snazzy new sticker. We take a quick look to see what's what."

Here are some more Storage reviews from around the web:

Storage