Had both of mine done nearly ten years ago as I suffered with several ingrowing toenails every year throughout my teens. I didn’t have the whole nail removed on either toe just the side cut away and then the root killed.
To be honest the worst bit were the injections as I have an irrational fear of needles (there was a moment in SawII when I almost died!)but also needles in fingers and toes are pretty uncomfortable. When it was all over and the anaesthetic had worn off I don’t remember any pain only relief at how much more comfortable it felt than before.
I had mine done at my GPs and had no downtime whatsoever.
To date it has been a complete success with regard to my right foot but my left foot does still cause minor problems but there seems to be a weak ridge between the wanted toenail and unwanted side bit so it is very easy and only slightly uncomfortable to remove.
If you suffer with reccurring ingrowers don’t accept any antibiotic and suffering in silence shit, get them operated on.