I only played with a demo version once and it seems very deep and thorough software. You may not come to an objective judgment as it is depended on what you want to do with it. From the short experience I got I can tell, if you are just looking for quick hydraulic calculation software you are better off looking other places. If you are looking for a complete package that will do more or less all, that is, design, drawings, 3D modeling, stock listing, calcs etc then it's surly one of the best out there.
One other thing I can tell is that it does not go well with the Bentley Microstation ecosystem. There are confirmed cases of issues importing Microstation native files, even after conversion to Autocad format.