Congrats to them but I find the product to perform quite poorly on HN. Seems to do some kind of fuzzy matching / weird relevance ranking and not full indexing when all I really want is a full index text search.
HN search should be parameterized by the user, where they've commented and what they've clicked on. The last part is why outsourced search performs poorly. They can measure what you click on in their search results but I doubt they know what you clicked on HN.