This review contains spoilers.
This is the 'official' 200th episode of 'King of the Hill', although some count the previous one in that position. (It's all to do with season six's two-part 'Turning Japanese' being counted as a single story).
Anyway, this is a well written and enjoyable episode. I really like the character of Lucky - as with so many other characters in the series, what could have so easily been a stereotype character going for cheap laughs is actually a warm and likeable character.
It also marks one of the key changes in the series, as Luanne and Lucky (eventually) plan to get married, and Luanne falls pregnant.
A nice end to an enjoyable season. Although some fans have said that the tenth season wasn't so good, I personally found it to mostly have some very good episodes, with only the odd 'average' installment here and there.