B-12 vit pill vs b-12 shot

hey looking for some insight on pros and cons of taking the b-12 vitamin or getting the shot, i am horrible on taking the pill everyday, i usually try to get it 2=3 times a week. but ive been told that if i get the shot once a month it will be more beneficial is there any truth to this??? input please!!

I have never had the shot since surgery, only before when doing the diet pills.

I take the sublingual B-12 with Folic Acid from Trader Joe's.  I take one every day.  My B-12 level is over 1000 consistently.

BUT, I am guessing that the trick is to TAKE it.  I find it not to be a bother, but I am very compliant with all my vitamins.  Wish I could say the same about my food, but I'm working on it.