I still like them. But..
I did a short trip into an area where there are many sharp rocks and the rear tyre does have some small cracks in it. I don't want to exaggerate them, they are not big enough to worry about and I think it could happen to other tyres as well (I don't know). It hasn't stopped me from riding the bike :)
In fact I've done several thousand km's since with no problems in that condition.
I did have to replace the front tyre because I hit a steel cattle grid at high speed. It didn't damage the rim but I got a lump on the side of the tyre. Again, I don't blame the tyre. I also dented the bash plate on the same trip.. so I was going much faster than I should have been! I'm actually not usually a fast rider.
Would I buy them again? Probably? I still think they handle really well onroad and are capable offroad.
Also, I just completed a ride with a group of other Multistradas and Desert Sleds. The Pirelli STRs were the most popular tyre of the bunch, and the Desert Sleds were definitely very capable offroad. I didn't ride one myself, but I think they're great bikes and would love to have one in the shed..
First three pictures are from the trip where I damaged the front tyre and bash plate. Last picture was from the group ride about a month ago