I had to bring it back twice the same day. It didn't overheat, but the needle went two thirds of the way. Normally, the needle sits at the center of the gauge. You could hear a "steaming" sound coming out of the cap where you pour antifreeze. Also the the new idling solenoid does not appear to work. The idling drops too low when the fan switches on. I can't increase the idling as the choke is malfunctioning. Move the lever up, the idling doesn't change much. You can see choke mechanism/cable move maximum/minimum, but the idling level does not respond. Apparently, there is a pin in the carb that control the choke/idling solenoid, and this bit need fixing - it was explained to me, but not sure. Hopefully, they can fix it.
They kept the car of for a day or two previously to iron out the above. I looks like they didn't do much with it in the the two days they kept it.