When DD1 was 7mo I did it. DH is hearing impaired, so he never heard her overnight. For two months she woke every hour or two for a bf. She never wanted to co-sleep and frankly neither did I. So after two months of hourly or thereabouts wake-ups I was over it.
I rang tressilian for support (they were great - supportive of whatever decision I made. Suggested no feeds between midnight and 5am) and made the decision to do it.
I think it depends on the child as to what techniques will be suitable. I personally found that my being in the room attempting to soothe DD made her all the more upset. All she wanted was the breast and got exceptionally angry/distressed at anything else. So I did something more like Ferberism - just watched the clock. I'd wrap her, kiss her, leave. She'd cry. I'd go in after a couple of minutes, stroke her forehead, kiss her, leave. I'd leave it for a good few more minutes... etc.
It worked and she started sleeping through a short time later. I can't remember how many nights - there were some nights when she'd wake before midnight but I'd refuse to feed her. If she woke after or close to 5am then I'd feed her.
The positive is that it worked. She got out of that pattern pretty quickly. The negative is that it felt awful. I was doing it on my own and DD would be so upset. I know you don't want to hear the negative, but I feel like I need to let you know it's not an easy road.
GL, and I hope it all goes quickly and smoothly for you.