We stayed with friends two weeks in Lallina and just loved it.
The house is spacious, the view gorgious, and the interior useful, no needless decorations that could break (quite handy with kids). The three bedrooms have enough space to feel comfy, you have a wardrobe and cupboard for your belongings and aprivate bathroom each. Our kids loved "their" fourth sleeping place- a couch-bed behind a curtain with en-suite next to the living room. The house is clean.
The windows have inside shutters to keep the heat outside, so there's no need for an a/c (despite temperatures over 35 degrees C). Mosquito nets in front of the windows would be nice- we were eaten alive this year.
The pool is shared with three other houses, but each has its own sunbeds and area. The pool is well looked after and the owner maintains it daily. He is quite discreet but more than happy to help with information or just to chat.
It's a lovely spot, next to the house is a wee restaurant/pizzeria (booking is necessary but they do "take away" for the guest in case they are fullly booked). You also can get dairies at the farm next door. For other errands you definitely need a car.
Cecina beach is an hour drive, parking fee is moderate and you have free beaches in between, where you can bring your own sunshade.
Pisa with its Tower is quite nice for kids and also an hour drive.
Thank you for this wonderful holiday! I felt like queen of the castle!