I'm very excited to put my 3m documents into hstore, as they are currently in a horrible, unqueryable, unwritable (mostly) blobs of compressed, b64encoded serialized ruby hash structures (long story, predating nosql).

This makes me very, very happy.

Edit:

I should point out why: -my document structures pretty much match 1:1 with hstore now (we have nested arrays of hashes) -i can query & report on the data with normal tools -i can update individual fields on my data (currently impossible) -i can do relational joins & such-like in the db (currently impossible) -i can have sensible transactions