This looks similar in construction to the SE manual tensioner. If I remember correctly a lot of people removed them because they were very noisy and or transmitted a lot of vibration to the powertrain? 
I will be curious how you like yours. I had the Baker unit installed and properly tensioned as per the instructions. It generated a lot of noise. Later I removed it when a few folks were bending theirs.
I think it is a clone of the screaming eagle part and yes it is very noisy. So noisy that I pulled it back out after 500 miles. I don't think it was hurting anything (that I could see) but it was distracting. I have since bought a Baker unit but sent it back after I looked it over carefully. I'm now using a Hayden unit and so far it is working great.
Before anyone asks, the Baker unit appears to have been modified once or twice since the pictures posted on their site and on the web. I'm sure these mods were to keep it from bending but shining a light through it you can see that it would take some precision machining to get all the baker surfaces (teeth, guide, slider) to fit flush at the same time. For the Baker unit to work correctly (just my opinion) they need a new inner primary with bolt/boss to hold the top. BTW, the changes they made have an effect of making it impossible to put on without removing the compensator/clutch hub first or I could not figure out an order to get them in. Maybe a stretched chain has a better chance but on my bike it was not gonna happen.
The Hayden unit reviews are like 90% positive and I'm in that bucket. My primary is quiet, shifts are better but not as good as the screaming eagle clone unit I had in, and I can move the chain up/down at least 5/8 compressing the Hayden springs. Even if I must change the Hayden shoe/spring every 20k or so, I would do it. Some have said their springs/shoes have broken but most people are happy and so am I.
I will check the Hayden after a few thousand miles and may end up with a different opinion
