Just ate the last of the pickles a couple of days ago. I will definitely do this again.
I used a mix of mild hot peppers, fresh onions and diced celery, and poured hot brine over them, sealed and kept them in the fridge. The little celery bits were still crisp after six months.
I have a couple of celery plants still alive in the greenhouse and starting to put on new growth. May have to pickle them before they bolt.