I've had a Q20 sit down model for a couple of years. I love it. The tension has always been great, and it doesn't seem to be too picky about thread. What I discovered is it likes universal needles the best. The bobbin is a tad tricky to get in the exact right place so that would be something to be extra careful with. A couple of times it was a little off and I had a hard time getting it back out. Also, I was told it needs a drop of oil every day. Check the on-screen tip on exactly where to put the oil as the book instructions are hard to figure out . Have fun! I just started using rulers and it's going pretty well.