I really wanted to share this, I did update an earlier thread but I thought I would post a new thread about it as well, as it has made such a difference to all our lives.
DS (22 months) was always a terrible sleeper and a very keen night feeder.
I started shortening night feeds about 6 weeks ago (?). I started cutting back to 4 mins (I think) at first for a week or so and then I cut down to 3 minutes for another week and then 2 minutes for another week.
Then I cut down to 1 minute and at this stage he started sleeping through. He does wake maybe 2 times a week and I do feed him if he is upset but for no more than 1 minute and then he goes straight back to sleep for the rest of the night with no fuss.
I am having 7 uninterrupted hours of sleep for the first time since he was born! 
The whole process has been very painless and although he did cry a bit at the start when I started shortening feeds, he adjusted pretty quickly and doesn't cry much at all now.
We have his last molars and transitioning to a bed still to get through, but I am really confident that we have finally turned a corner with his sleep.
I remember feeling quite hopeless about it all and I dislike hearing him cry at night so I never wanted to make big abrupt changes while night weaning, but it has all been so simple and easy.
I wanted to share so my experience could maybe help someone else who feels like night feeds will never end!