Ken Burger reports LaMarcus Aldridge was 'impressed, for sure' by his meeting with the Spurs.
Most reports have Aldridge leaning towards San Antonio. In addition, Mike Bresnahan has reported that Aldridge has eliminated the Lakers as a possible destination this Summer. Specifically, he wasn't satisfied with the Lakers' sales pitch; they focused too much on external factors rather than basketball itself.
Source: Ken Burger on Twitter