For me. removal was not bad. Took maybe 10-15 minutes without a lot of fussing by the doc. He was experienced and seemed to have confidence the whole way through that both insertion and removal went according to plan.
Long story I will try to shorten: I actually had 3 sensors. My second sensor was dislodged about a week after insertion (ice hockey) , became infected, had to be replaced. For various reasons, I knocked the infection down with antibiotics and left that abandoned sensor in my arm for 3 more months and had both sensor #2 and sensor #3 removed at the same time.
I still have a scar on each arm though. The scars are about half the size of a raisin so they are noticeable. The scar does not bother me but I expect there are many potential users that would not want to be scarred like that.