Greggs is great every now and then, going in every day for lunch might not be a great idea though.
You have to think of greggs in the same way as things like Burger King, it's not a baker anymore, it's a fast food shop, they sell by tasting nice and being cheap and not to be "healthy and home made", people who say "oh I fancy something good, lets go to greggs" is either thick or deluded, they serve crap filled with crap so it tasted nice and people will keep going.
I like about 3 things from Greggs, Chicken Bakes, Pizza Bread...things and the Chicken and Mango Sandwiches.
There seems to be a rather odd idea of how opinion works in this thread, I suggest everyone look it up.