Cruz28

I took mine off after reading many threads saying they were really bad for our cars but I would like to know exactly what it does that is so bad because I never had any issues with mine and I used it for about 4 months. I think the car actually felt smoother at idle and running. I'll appreciate any info I can get because sometimes I feel like putting it back on, I just don't want to risk screwing the car up. I already tried the search and didn't find any specifics. Thanks.