I've been running these for 4 months or so and have no complaints. Subjectively, bite and stopping power have both increased but they remain progressive. Of course, they were fitted after the OEM ones were pretty shot so they did feel fantastic at first.
Only downsides are that I have had a bit of an issue with squealing, although that's pretty much settled now, and despite being billed as low dust they still produce plenty - less than OEM though and I suspect less than Redstuff's.
HTH
Think AndyC has them too