Don't worry the function lives up to the looks and visa versa, in fact its gives everything and more.
The fine control is fantastic, a 360 ° of the fine control knob gives the narrow but critical range of focus. Its single rotation covers a focus range of on the edge of in, exactly on & slightly out of focus. Once you choose what feature you are looking at studying the ability to fine tune to it is really astonishing. For example: I was quite easily fine tuning to only a certain segment of a filament yesterday, seemingly tuning into the curvature of of the solar sphere. The coarse focus on this set up also performs to a high enough level of resolution, allowing the user to dig deep into a chosen area of detail especially for visual only purposes. With this unit in place the whole scope feels like the precision scientific instrument that its was intended to be.
Like I said before, I cannot recommend the addition of this focuser enough, its honestly beyond my expectations in how it allows the scope operate and handle...seriously good. When the seeing is good the ability to dial in right now is there, right at your fingertips. Absolutely no slop or travel, its all about just the response.