Revit MEP2009, as it pertains to plumbing, is a much improved software from its 2008 version. I am currently designing a project using MEP2009. This software still has it's problems designing piping systems. The major problem is still the "Auto Path" function. If I use this function the software still does not know how to connect fixtures. The results of using auto path on sanitary results in several code violations. This needs to be corrected if we are to use the software as designed. If I am designing manually, I am doing nothing more than smart drafting. And after a day of manually connecting the fixtures properly, I feel somewhat less than smart. Why? Because my productivity is non-existant. Autodesk needs to modify the software to do the job correctly. Examples; Every fixture needs to be vented. 99% of all fixtures require a P-Trap. These should be automatically inserted using the auto path function. Also, the proper fittings should be inserted automatically. If the people at Autodesk do not know what fittings are required to connect a fixture to a sanitary system, or any other system for that matter, I would be happy to upload drawings. As far as the interface, it could be a little more user friendly. For example, the zoom command icon requires a pulldown menu to get what you want. Pulldown menus are a pain in the butt. I want to hit an icon ONCE to do what I want. It seems like a small thing however, the more clicks of the mouse, the less productive I am and less irritated. The view wheel is a bust. Simply put those icons on the toolbar. If I want to pan, I do not want to have to pull up a wheel and screw around with that. Just give me the icons. The construction documents side of the software really needs work. I may become the greatest plumbing designer in 3D modeling however, that means nothing if at the end of the day, I cannot produce an excellent set of construction documents. Autodesk needs to really put some effort in improving this software so that when a project is submitted, the client would have no way of knowing if the construction documents were created with Revit or Autocad. As of today, they would definitely know the difference. It's like comparing drawings that were drawn with a sharp pencil and a crayon. I have more suggestions but, I do not what to sound like I am simply complaining. I'm not. I just want this software to do what it is supposed to do. I enjoy every minute I am using the software, even with its shortcomings. I have been a big fan of 3D modeling for years. Please Autodesk, fix your software and make my life easier.