I can't speak to the service in the headline, but I used a service at least 10 years ago and brought it to a family party to show off. I thought it was a cool thing to do so we all filled out the alphabet/number/symbol sheets I printed out and made a bunch of fonts for family members. Didn't think much of it, the novelty faded, but then people started getting old and dying.

Now I have little snippets of history and unique handwriting, albeit simplistic and imperfect, that remind me of my loved ones passed in a unique way.