Chronic gingivitis is a very uncomfortable condition. I have had it before and my gums had become so sensitive that even brushing was a painful ordeal. I had to buy an extremely soft brush and use very little pressure.
It didn't seem to affect all of my gums either, it was mainly on the right side and I used to wake up in the morning and stare at the mirror to see if the swelling had gone down a little bit. But even though it felt better after the night, the brushing in the morning brought the irritation and sensitivity back.
Chronic gingivitis makes eating difficult too. I couldn't have very hard or crunch foods because it caused my gums to hurt too much.
Despite all this, I was relieved to find out that this was a reversible situation, unlike some other gum diseases. Like the article said, if you maintain oral hygiene, brush and floss regularly, it does go away.
I brush my teeth 2-3 times a day now, always floss at night and I try to brush or gargle if I happen to have sweets because I think that makes it worse. Thankfully my gingivitis has not repeated, but I did suffer from it for more than a year until it was completely treated.