Glad I didn't pay anywhere near full price for this...
For example, having to wait for your pilot to heal or you Gundam to be repaired makes the game take forever to play. Yeah, you can swap out pilots and Gundams between missions, but you then find yourself using points to power up Gundams you might never use later just to beat a mission while your main Gundam and pilot are out of commission. It also sucks that it takes forever to install an upgrade to a Gundam... nothing is applied instantly. Also, you can usually only apply one upgrade at a time.
When you request a new pilot or gundam, the process also takes a long time for them to be transferred or built.
If you are short on time or patience you should skip this game altogether !