These trulli are lovely buildings in a lovely location but I would suggest this accommodation is NOT suitable for young families. Make sure you pay attention to the floor plan. It is a collection of buildings that are in no way connected which is problematic if you have young children who are not old enough to sleep in a building unaccompanied by an adult. It is not necessarily possible to understand this looking at the photos.
It is also important to understand that the buildings are very small. This may be expected with trulli/trullos but if you have not stayed in one before you may be surprised as the photos do not show this. Again, this is particularly a consideration for young families as it can be hard to manage in the small buildings. The shower essentially has the toilet in it, so with young children it is very easy for the toilet and the toilet paper to end up wet and water over the floor from wet feet because there is no space to dry off, mixed with the fact that you have to walk outside every time you want to change building it can end up getting messy as the floor gets dirty.
If neither of these is important then this is a lovely location, with beautiful scenery. The trullos/trulli themselves look lovely set in the property.
When we stayed, our air conditioning did not work, and when we put the A/C on fan mode, it made the bedrooms smell of mould so it had to be switched off. We also were unable to lock the bedroom doors when inside the rooms, we could only lock them from the outside. We alerted the contact to these problems so they may be fixed now.