The Shield Generator is an interesting beast. On one hand, Jeff Kaplan was right that this made her much more versatile. If there is a situation where you don't necessarily need a teleporter, Symmetra is now not completely useless.
rnThis gives teammates who come into contact with it a 75 HP shield that will stick on you even after you leave the immediate range.
rnOn the other hand, if not played correctly, this will be little more than a consolation prize. Many Symmetra's opt to set this up in base, since all an ally has to do to earn a shield is pass by it. However, it appears to have somewhat of a range, and your allies shield will replenish automatically if you set it up near the action.