I’ve grown garlic this way (on purpose, too!) and it works well if you want a lot in one go. I do a lot of cooking large batches of things for the freezer, and this makes preparing it much less tedious. I don’t recall if I tried to store any, but my hunch is it wouldn’t store well, unprocessed. I am currently using ready crushed garlic either frozen, or preserved in vinegar at the moment, and I’m sure it could be preserved as either of those fairly easily. As I haven’t actually planted my garlic I’ll probably do it again this year. If I’ve got a few spare cloves, I’ll put them in the fridge to see what happens.