I don't know about that one, but I did get one of these and am quite amazed at how much light it puts on the road. At 3800 lumens, it is nearly double the 2000 lumens of the one you linked.
The reason that I got only one was that I bought it for the Enfield, but it didn't fit as it was too long at the back and interfered with the speedometer cable. So I tried it on the Rocket. It is a reasonably tight fit, as there is quite a bit of cabling, but it does fit.
There are some who say that you shouldn't use LED "H4" globes as they don't aim the light the same way that a "proper" H4 does. In this case, that is a good thing. The H4 on my Rocket is useless as far as aim goes. If the high beam is set to light up the road ahead then the low beam will show you what the front tyre looks like. If the low beam is set up correctly then the high beam will be searching for wombats in the tree tops. However, the LED puts a big, bright light coverage where it should be - all over the road in front of you. The high beam then adds all the light you need up ahead, and on the road where it should be. I shall be ordering another one for the other light this morning.