I have 2 Berninas and neither one has ever complained about any thread I have ever used and I have used many different ones.

I use Coats and Clarks dual duty on all my machines even my Viking. It works just fine even on my Baby Lock Jane on my long arm table. It is the one you buy at Joanns. I use a coupon when everything else is on sale.
I tried other brands some expensive and Connecting Threads, (it is linty). But at the price of C&C its the best for me.
I have learned to use the same thread in the bobbin and on top. It makes a difference.

Well yeah 3 total posts, they have only been a member since June---does it make a difference how many posts they've had? Perhaps they forgot they asked the question

This may be the most correct answer, assuming she was talking about the bobbin. I even had a bobbin wind incorrectly on the machine I was using it on; I didn't pay attention when the thread slipped out of the guides so it wound really sloppy. This was in a class and the instructor caught it before I did. She made a similar comment. I also tried winding bobbin thread for my Brother embroidery machine on my regular Brother sewing machine and that didn't work well. Same bobbin, same winding method, different tensions for the different machines.

There is undoubtedly nothing wrong with the thread itself, but your bobbin may not be wound correctly for your machine.

I've never had any problems with the Essential Threads which I started using about 2-3 years ago. I use them in my new Viking sewing machine; I like them as well as many other brands I have used. I took advantage of a recent 30% off sale and picked up about 40 spools in various colors. It's great thread!

I have a Bernina 580 and a Viking Diamond and neith one is trouble by the thread. Perhaps the instructor is just trying to boost sales?

Being a "sewer" for nearly 60 years, I have bought a lot of thread. The only problem I have had with any of it was when I started to make a quilt for my gs. I decided this was a chance to use up some of my odd/ends thread. BIG MISTAKE. Some of the tread was really old, had been exposed to sun light, etc. After the quilt was all done, I gave it to my dgs, who was about 16 at the time. He loved it, and put it on his bed. THEN one by one the seams all began to come apart. I have spent many hours hand stitching that quilt. I now only use FRESH thread!!!

What I don't understand is why you would post the same thing, question; again, just worded a bit differently! How many answers to this question do you want? This is strange to me.
Judy

This sort of dealer talk is seemingly common. Who knows why. Use the thread you have - if you have problems, try something else. I use all sorts of threads on all my machines and I have some Essential thread as well. If something doesn't seem right, you can try another lighter thread int he bobbin, such as Masterpiece fro Superior threads, or something else and see if the machine likes that better, knowing you need to tweak tension from time to time as you change thread. Good luck, and happy sewing. :)

Maybe because she doesn't know how to get to the board directly and doesn't know how to find her original post?