Both my children wear night time lenses which correct their vision and have done since they were 8 and 7 years old respectively. They have had them for about 3-4 years now. They wear i-go lenses which I assume are similar but a different brand.
We went for them over glasses as my daughters vision has deteriorated by -2.0 in one year and would likely continue to do so. The i-go lenses have halted this deterioration. Her father has a prescription of -7.0 and he wishes the lenses had been available to him as a child.
As to how they got on. Child 2 took to them like a duck to water. Has no trouble putting them in, and as he is very sporty, it has been great that he does not have to wear glasses during the day for sport. He is quite scatty and I imagine he would always lose or break his glasses.
Child 1 did struggle in the early stages as she was so young. She really did find putting lenses in and taking them out very hard. Initially it took three separate visits to the opticians for her to learn how to put them in and out, and once home, often took her 20 mins in the evening to do so herself for the first 2 weeks. It was a hard few weeks. However, she persevered and now is fine and very adept at it. In all honesty she doesn't particularly like them but then glasses can be a pain too for a teenage girl. I do wonder how much her eyesight would have deteriorated if she didn't have them.
We have found the correction effects actually last about 3 days. When my son lost one (and whilst waiting for a replacement) he noticed the difference after about this timeframe. In fact now, even if he is tired, he is keen to never miss putting his lenses in as he doesn't like not having perfect vision.
Also we have had no problem with eye infections at all - although our optician was very good at teaching the kids good hygiene.
I hope this helps.