MBL risers are one of the best available. Have them on my '06. Very well machined parts and fit perfectly.
(Don't know what a previous poster's problem with them was, but perhaps an install issue? Also, there's both a Standard and Tall Rider version of the MBL risers. Maybe the fit was wrong for him?)
As another poster mentioned, you need to come up with a little slack on the throttle cables.
Here's a picture of what I did on mine to accomplish that:
From the factory, the throttle cables are routed through that wire loom on the bike. You can get just enough slack in the cables for the risers if you connect a large cable tie like I show in the picture to that wire loom, and route the throttle cables through the cable tie instead of the wire loom.
Worked great. No problem with the throttle cables binding.
Also, I cut out the plastic fork tube cover that comes on the bike to fit with the risers installed (the instructions show how to do that). Some folks just throw that piece out, but I wanted to keep it. Here's a pic of mine showing that:
This is the left side. You can see where I cut that plastic piece to fit around the riser after it's installed. You can see that piece on the right side in the first picture, I'm holding it up with a screwdriver.
Hope that helps.