Sneakpeek?

I’m curious about doing sneakpeek gender testing. My friend did it twice at home and got invalid results both times. She ended up forfeiting it and taking the refund. I wasn’t going to do it because it’s quite expensive. But I was gifted some money and it would be enough to cover the clinical one so I’m wondering how it went for those of you that went into a lab and had it done by them? The lab near me is called AnyLab and if I did it I’d do it this Friday at 12wks.