Ultimaker

When working with the Ultimaker, pay attention to the following things:

Close the Python apps when taking over from someone else or when starting from fresh. This is not necessary, but reduces the risks of running into problems.
When printing small objects and objects with a very small base, print on a raft (even for PLA)
After preparing the print, press "Print" in the main window (the one with the 3D Model) and wait for the second window to pop up. If you can't see it, look for it. Check that the Windows is called after the file you want to print. When printing several files in a row, always be sure to close the second smaller window before printing the next item or you will print the first item again (check window title).
Sometimes the plastic won't stick to the surface. Cancel the print and use the controller (little box hanging on the machine) to return the extrusion head to "Auto Home". To do this, navigate (using push and scroll on the wheel) into the Menu->Prepare->Auto Home. To make it work, the plastic has to stick to the surface before it makes the raft/outline or it will only start to stick at a random moment before or during the raft, with a high risk of leaving a small drop of extra plastic.
Don't forget to take the object off the platform before printing the next one.

Some links:

kit at 1214 EUR + VAT + shipping