How much do these links raise the bike?  Does it provide a softer ride?  The H&D description is hard to interpret.  I'm not a trick rider but would like something more compliant so easier on an old body.  The Montesa rear suspension also feels quite dead compared to my Beta 4T. 

"uprates the soft rear end and aids the ability to 'trick' ride and hop around the rear end by providing an even more progressive shock."  

They give a little more leverage for the shock, it’s hard to explain how it feels, but the shock feels a lot more responsive to rider input. There isn’t much difference when you line them up side by side but it does feel better to ride with.

I prefer the feel of the Showa shock compared to the RCV thingy and run with about 7 threads showing below the lock ring. Be careful though as it can be a little more prone to throwing you over the bars until you are used to it. 
 

Make sure your bearings and bushes are good. 1mm of play in the linkage turns in to a lot at the rear wheel. Don’t skrimp and buy the all balls kit, Always get the genuine Honda bushes and most importantly the spherical bearing, it’s a world apart from all balls quality

I did get one and install.  It does feel more lively and seems to absorb more for a more cushioned ride.