I agree with Bry on the fact that is a dang struggle trying to turn the devices on and off, but at the same time, it's appreciated in case playtime gets rough...i think it would upset me more if they flicked off easily. With that said... I personally loved the feeling they gave my nipples. They hold on tightly and I enjoyed how strong the vibrations were! *if your fingers have lube on them...good luck turning them on and off. I had to just pull them off my nipples...intense feeling but I liked it! Overall, I don't mind this purchase. I think I'll use them tonight!!

The switches on these are darn near IMPOSSIBLE to switch on. They are extremely stiff and if you don't have nails, you aren't going to be able to turn these on. I actually broke a nail trying to get these going. I even tried turning them on and then attaching them to my nipples-but trying to get your nipple into something that is vibrating is equally as hard. The vibrations don't really stimulate anything, to be honest.
Super disappointed. I was really excited for these, but I can barely use them. I wish I could return them. I hate to write negatively, but I hopefully I can help someone from avoiding my frustration with this product.