Shopping help!

I have birthday money. I need to get some sort of medical alert jewelry (preferably before I go flitting off to P-burgh next month). What do you all think of this one:

http://www.etsy.com/listing/54459865/my-condition?image_id=168238510 (and, like the one in the first picture)

If it is something that I have to wear every day, I am just not enthused by the ones you find at the pharmacy.