For my partscaster build I wanted to upgrade from a standard trem - this trem allows for upbends as well as dives, and thus can give a more natural vibrato when used subtly.
It is expensive, but for that you get serious quality engineered components, a bunch of different tension springs and a finish that is appealing and ergonomic. No more pain on palm muting :)
The unit features good adjustment of all parameters, a handy quick installation guide and of course online videos that take you step by step.
Very happy with this purchase which sits in my Fender Body without need for modifications. Oh, worth adding that despite the very thin sustain block (to allow for the upbends) it is suprisingly heavy.