After lots of thought and having the three watches in my basket for a few weeks now, I finally went for the Apple Watch 4. I was tempted to go for the Ionos, but the ECG feature was the pulling point. I got it this morning and so far so good. I have tried the ECG and it is very good, showing my heart working well. When my heart next plays up I can record it for my GP which will help with controlling my condition.
One of the features I did not know was there until it alerted me was a breathing app. My watch vibrated, I looked and it told me to take a minute to sit and breath and instructed me when to breath in and when out, this is supposed to help relax and clear your lungs of stale air. I am looking forward to using the other apps and features on it, and am happy to say I love it.