I removed the Autodesk Inventor LT Technology Preview from my machine as it expired May 1st.
Un-installing, via add/remove programs, was trouble free* except for one aspect. I found the file association for .dwg files was still trying to use Inventor when a file was opened from Explorer. Changing the association from Explorer didn't seem to help so I tried a repair install of AutoCAD Architecture which restored it's .dwg association.
Now it's not free, would I buy Inventor LT?
That's complicated by the rather strange product offer in our region. While the US & Canada get Inventor LT as a stand-alone product in New Zealand it's going to be bundled with AutoCAD LT. While there is nothing wrong with the junior AutoCAD I wouldn't want it when I already have a full AutoCAD license in the form or AutoCAD Architecture or Revit Architecture Suite.
While I found Inventor LT an interesting learning tool I didn't use it enough over the preview period to justify purchasing it. Within it's limitations, parts rather than assemblies, I can see it being a good value tool for a machine shop wanting to try 3D design, and they might want AutoCAD LT too!
* If you've had any problems removing yours this post on the Labs blog might be of help;