I have not used the three needle bind-off technique although I do plan to use it on my WIP.
I have used a three needle technique for joining two knitted pieces together, producing a layered effect and I
the project a number of times, there were so many stitches, but once I got myself into a very focused place, I was successful. The join is beautiful! It is sturdy and appears seamless.
I think you would be very happy using the 3-needle bind off, it is worth the effort and you will have another technique to use in future projects.