I'd give zero if I could. My boyfriend bought me the Lucy Smart Cap for my birthday after wanting it for months. Due to it being a gift by the time I got it and tried it it was out of its return period however it has never worked. Waterdrop are incredibly slow to reply to their emails and only send you the information already present on their website. The last time they replied was over 2 weeks ago to say they sent videos I'd sent them to their tech team to review and I've have 0 response or update on how it's going. It is an absolute scam and so expensive for something that they don't even help you when it won't work. I've literally never had service as bad as this.