I own 3 stadia controllers and 2 of them have issues. The first controller is having charging issues it just charges when it wants and the second controller is having an issue with the left stick, the third controller has no issues yet.
I primarily play Destiny 2 and a few people in my clan have had issues as well. I had to get my founder's edition replaced because of connection issues and then after it was reset it wouldn't show up on my wifi to be paired. One of the guys I play with has gone through so many controllers because of the R2 & L2 issue. He's trying to get one with a later manufacture date. It's pretty sad. I love the look and feel of the stadia controller but the QC issues are killin' me.