I look at reviews of Pantos and I try my best to avoid those with lots of back tracks simply because I dislike thread build ups but more importantly, I dislike trying to place it back in the correct spot should there be a breakage or the thread runs out 🤪. I think any “issues” I have encountered with a design has been thread or just one of those days. Do read the recommended sizing for a pattern as some may not do as well when adjusted.