The Husqvarna-viking E20 has a good solid build and many useful features. The tension is automatic but you can adjust it if needed, and you can vary the stitch width and length. If you are using thick material or are trying to sew a bulky seam the two step pressure foot is very handy. Stitches include various over-lock and decorative options.
The accessories include a darning foot which was really hard to fit. I would recommend the generic low shank darning foot I bought from Amazon which was easy to put on and accommodated my large hand-embroidery hoop easily.
If I have a quibble it is with the instruction booklet. The instructions for accessing the decorative stitches were not clear and it was only by trial and error that I worked out how to do it. If you want to do the decorative stitches, your stitch length must be between 0 and 1 and make sure you have the satin foot on. Also, how to use the built-in threader is not explained. I got the impression this feature was added before the manual was updated as this feature is not mentioned in the product description. I had to turn to the Internet for help. However, I am not complaining about an extra!
Altogether very good value for money and I was pleased with the service from GUR.
I have received this link from a Mr McCarthy [...]. Thank you for the link. I have watched the videos and they are very useful. They clear up all the questions raised above.