I'm always hesitant to put racks on bikes because anything heavy duty enough to carry a great deal of weight will probably have an adverse effect on handling, and if your carrying stuff light enough to put in a flimsy basket, then you could just put in in your bag and save yourself getting shit out of a basket every time you lock up.
I use a basket when I just don't wanna bring a backpack out on a ride. The handling takes a bit of getting used to but it's not bad, have done 100mile rides do cannalpath and greenway with baskets before.
I'm always hesitant to put racks on bikes because anything heavy duty enough to carry a great deal of weight will probably have an adverse effect on handling, and if your carrying stuff light enough to put in a flimsy basket, then you could just put in in your bag and save yourself getting shit out of a basket every time you lock up.