Has anyone done couch to 5k?

Did it from zero running ability 5 years ago after recovering from leukaemia. I was at the level of fitness that I was walking 10k steps a day on average easily, but wasn't doing any proper cardio, or gym activities. I found it very useful as the problem I had always had with running was that I always felt out of breath and that it was just too hard after a few minutes of it, so the slow build up with regular intervals was such that I could manage it and build up fitness. I did find that the last few weeks of the program were progressing too quickly for me - I'd sort of plateued at not being able to run for more than 10 mins at a time without a rest. So what I did was I ditched the program and did some sessions of for 10 mins 4-5 times with walking rests, and then built up to running as long as I could, followed by a walking rest and repeating. I was probably doing 6k-7k over the entire activity before I could then just run a 5k without any walking rests in it's entirety. I think my first 5k pace was about 7:30 minutes Kms, which was slow, but this just gradually increased as I kept running up. Now this year I'm aiming to do 1000km over the course of the entire year - I'm a little behind as I've had a first child which has taken a lot of my time up, but I should be able to catch up again and get it done. I generally try to stick to heart rate zone 2 in my runs now (I'm quite prone to injury otherwise as I'm still on lots of meds with side effects), and usually try to run 8-10ks rather than 5ks, and I'm generally averaging 6:15 a km on these easy runs. It was probably about 3-4 months after doing couch to 5k that my lungs stopped being the limiting factor and started being my legs, as I just always felt out of breath. It was also then that I realised that I much preferred running at an easier pace than constantly trying to run faster times. I say to people, use couch to 5k as a base, but don't feel you have to stick rigidly to it unless that structure helps you. Running as far as you can until you have to take a walking break, and repeating this for as long as you can for a 20-40 minute session 2-4 times a week will massively increase your fitness and running ability.