The packaging was great, looked very professional, but it took me ages to figure out that the syringes had a cap that needed unscrewing. Nowhere was this on the instructions. Also, the syringes showed markings of 3 units, which didn't make sense when splitting it into quarters. The first 3 days, the gel didn't even touch my teeth when inserting the mouthpiece. I experimented with putting it in slightly different areas on the tray, but still no joy. The last 3 days, I just applied the gel directly onto my teeth, but this wasn't enough to notice any whitening. It was the Dragons Den endorsement that persuaded me to give this a try, but for me it was style over substance and I wouldn't recommend. I'm leaving it to the experts and getting my teeth whitened at my dentist. Would give 0 stars if I could.