Very few other small cars provide as much space for its passengers in the back. Head room is extremely generous, while leg room is very good by small car standards. Your rear passgengers will certainly feel more comfortable than they would in a Ford Ka+.
There are no pockets on the front seatbacks for transporting maps, though, and although the rear doors have pockets for storing things, they are really quite small.
As good as the Sandero is, shoulder room will be tight for three adults in the back. At least the middle passenger doesn’t have much of a central tunnel to straddle.