Mine changed our meters to a cheap, nasty and useless one nearly two years ago. It was disastrous. So inaccurate it completely undermined any intuitive sense I had of where my BS might be. I had a reading of 30!! I injected only 4 units of novorapid, being cautious, and 45 minutes later I was down to 2. The fluctuations damaged one of my eyes and I've only recently stabilised. All the visits to the eye specialist must have completely wiped out any savings they thought they would make on the meter. Now I've been allowed to go back to a proper meter! Still have damage to my eye but it's stable.