It's a little small for a family car. As a daily runner, the manual is very nice. I like how light the car is overall and you can feel the lightness. I don't like the auto as it's sluggish. The manual is good and pretty responsive, I suspect it's got better fuel economy too.
Size wise like I said it's kinda tight inside, similar to a Myvi 1.3 at best inside. Boot is pretty good sized and since overall the car is so light (sub 1ton) it's gonna give you good fuel economy. Assuming you buy the car new, it's not too expensive and probably has limited 3-year free servicing or something. Not a bad car overall but depends on the size of your family. A family of 4 is ok. 5 a bit tight.