The problem I have with all the Viaterra hard parts is the awful quality of the bolts supplied. They will strip easily if you apply decent torque and will be hard to remove later. They may also damage your bike by stripping the threads. Supplying good quality bolts is not a big ask and I was quite surprised at the low quality. The colour of the bolts did not match the parts.
Also, there is a noticeable gap between the riser and the stock mounts.