Can any Christians comment on the importance in the Christian faith of partaking in this?
I'm not sure this is exactly what you want, but I was raised catholic before I became the heathen scum that I am today. Never was a JW.
Anyway, after a catholic child makes their "First Communion" (somewhere around 2nd grade if I remember correctly) they are then allowed to receive "communion" which is the unleavened wafer that (supposedly) is jesus' body. It's been a loooooooong time since I went thru this voodoo myself, and the wine wasn't even part of the deal back then. It is now, but I don't know if there is an age-limit on giving it to children...
Catholics can actually receive communion every day of the week! The churches usually have services (mass) every day, sometimes multiple times and then the many services on Sunday. You can only "partake" (borrowing a term...) once a day and (at least it used to be) only after fasting for at least an hour (can't have jeebus' "body" mixing in with some cheap, instant breakfast food!). Way back when I was a kid you couldn't eat from 12:00 midnight the day before receiving communion! It made going to the masses later in the day a real ordeal. Technically, you can eat christ's body 365 days a year!!!!
So I would say "yes" it is a big deal for catholics. They have a whole big-deal ceremony to induct children into being able to partake. It is viewed with much ceremony and seriousness and getting communion at a mass is a central activity of the service.