Question about installing Cinnamon in Ubuntu

Hi,

If I install Cinnamon according to the instruction in the following link:
Ubuntu + Cinnamon - A good idea? No. A great one.

will I still have unity, and will I still be able to choose unity when my ubuntu will start?

Thank in advance

---------- Post updated at 09:48 PM ---------- Previous update was at 08:40 AM ----------

Well apparently I found out that we can have both.