I have the S30 Pro (not extended) and like it a lot. It is very well built and assembled without a hitch. I think the new design Xaxis gives it great positioning accuracy, even after adding a manual Zaxis adjuster (King Gubby). The air assist pump is so quiet I have to touch it to confirm it is running. Although xTool said the RA2 Rotary was not compatible, I added it without any grief.
To summarize, I am very happy with my machine. Here is my setup going back a few months;
You will also find @misken to be a superb source of information on the Sculpfun machines (he has his own website).
There, you have it. The opinion of one user.