Singer Tradition 2250
Bought brand new from Argos in 2012, then again in 2015.
I have limited sewing experience, but enough nous to read a manual and try things.
The problem I have with these machines is that they will work flawlessly for about one month and then go completely awry. No amount of tension adjusting (top or bobbin), needle re-threading or thread swapping will fix it. You will have unfixed stitches abound, zig-zags that become Ys and all the rest.
The frustrating part of this is that for those first months, they really will do the work. I've sewn through layers with interface, thin pleather, no trouble. It's a simple, clean, functional machine, with a seemingly-limited amount of features to not intimidate the beginner, but also let the knowing expert do their job, as well as not including extraneous 'you don't need it' stuff.
If I could find a more reliable machine for the price (I paid £100 on sale for my 2015 model. Bought to replace the 2012 model that just went mad one day.) I would chuck the Tradition in a heartbeat. Until then, I really think I might buy a third 2250 just so I have something familiar to use...