My partner and I use it -- my 4.5 month old ebf dd doesn't like bottles (for the three hours I'm away from her each week). So, my partner tapes it to his finger and my dd drinks happily! We call it his magic finger. It's not how it's intended to be used, but works brilliantly. (Now, though, we have an Adiri bottle that works).
SNS is great, but has it's issues, have you looked into a LACTAID? it's supposed to be more practical and I know that for long term use many women prefer that. It depends what you are using it for? Can you explain your situation a little?