We've had universally poor experiences almost every time we've needed the NHS.
They killed my MIL by leaving her with double pneumonia on a trolley in an A&E corridor over this last New Years' Day.
My OH has cancer, and has been on his current chemotherapy drug treatment for four years - never once has his drugs been ready on the monthly start day, he's constantly had his blood tests cancelled, likewise his monthly infusions, the consultant hasn't a clue when he started his current round of monthly chemo - because the oncology dept is a shambles, sometimes it can be 7-10 days late before he gets the drugs, which pushes that month back, which fouls up the following month, etc., and their admin team simply aren't capable of moving all subsequent appointments/start dates back the corresponding number of days, so the next month is a foul up too!
In 2010, the NHS finally killed my father after about four years of misdiagnoses, languishing in various hospital wards clearly with the doctors just waiting for him to die because there was no urgency or any idea at all as to why he was deteriorating, nor did they seem to care. First time was a simple bowel blockage, but it took six months for them to diagnose the blatantly obvious, over which time he turned from a fit and healthy 60+ year old to a frail bed ridden shadow of his former self. It took him a year to recover after they finally operated, and then he started with lots of other symptoms which the GPs fobbed him off with. A year after he was going downhill again, he collapsed, blue lighted to hospital, where they diagnosed cancer. Weeks/months languishing in hospital wards again whilst they did tests, numerous consultants, all saying he needed an operation to remove the tumour, but never actually doing it. Lots of "booked" operations, constantly cancelled. It was probably 6-9 months before they operated, and of course, afterwards they said it had been too late - lots of shrugged shoulders, but they really didn't care that they'd effectively killed him with their delays, cancellations and dithering.
They killed my MIL in 2008 after another misdiagnosis - again GPs completely failed to diagnose cancer despite numerous consultations with serious symptoms pointing to cancer. Again, only diagnosed after being blue lighted to A&E after collapsing, and again, weeks and months of delays before they actually did anything.
It's really not fit for purpose. Cancer treatment in our area is particularly crap. Both in terms of GP surgeries not diagnosing it and then in terms of an utterly disorganised and chaotic oncology department.