Hi and welcome to another part of "Is it actually good or is it rated high only because the parent title is popular?“ series. And as is unfortunately the more common answer – it’s not actually that good. Note that below are some minor spoilers as it’s a bit impossible to review a short one-shot without bit of spoilers.
So, what is even this? It’s a very short eight pages long extra chapter. Six pages if we don’t count the title spread you can see as the picture here on MAL. It’s about Haruhi noticing she’s short in comparison to rest of the present cast. It’s
implied that Honey actually took supplements to dwarf his growth. The end. Quite meaningless except that one extra information about the growth. But wait, no, it’s not the end, the very last page reveals that the whole thing was actually just a dream. Making it completely and absolutely meaningless. What a cop out. This is the kind of thing that gets put on the end of a volume as an omake, definitely not something anywhere close to the score of of 8 or 9.
The only reason I’m not calling this a waste of time is because how very short it is.
(For those trying to find which chapter this is, you might also find it titled as "Ouran High School Host Club 2010-12 Lala Special".)