After problems with my coverstitcher skipping stitches, I had a look around t'Internet and lots of people recommended Maxilock stretch thread, so I bought some.
I've finally got around to trying it and I am very impressed so far.
I've just hemmed a couple of simple knit skirts and normally I would have had some places where the looped thread didn't catch in correctly. I followed the tension settings shown on the Janome/Elna FB group and everything is hunky dory.
I'm very pleased as including postage it wasn't cheap but I'm happy to buy it if it means I can get a good result first time rather than faffing about sorting things out.