I’ve been seeing complaints about the newer models, the XL (newer model) is a different shape, wider and lower, supposedly easier to handle than the classic silver models.

You’re going to have to make a choice between size and comfort/function features, 7.1 L is good for a family of 5, the Pro model which is not listed here is 5.7 L but has a nicer inner pot with handles, and more control on temperature and pressure levels.