We do recommend Antonio's Trullo!
Although not in the center of the Trulli area (but very near from it) it is very well located (with a bakery and a supermarket nearby). In fact we do prefer its location to have some rest and peaceful moments away from all the buzz of the touristic zone.
The Trullo can well accommodate 4 pax and is very well equiped and clean.
If you want to have an amazing experience of how it is to live in a Trullo you really should stay at Trullo Monte Grappa! Hope you enjoy it as much as we have!