I think buying cheaper electrical goods can ultimately be false economy .But to be honest it sounds like the luck of the draw. You can hear good and terrible reports about the same machine.
If possible I would buy from John Lewis as they have a 2 year guarantee and, I think, have tried and tested the things they sell. Also excellent customer service if something goes wrong.
John Lewis own products are really good. Their own make dishwasher and hob are still going strong after 15 years.
72 year old 5 year health check
I wish there was an edit button!