The last time I went to whiten with the 2-part I had always used, it just didn't seem to do much. I searched for strong whitening gels and chose this product. Best decision EVER. The product is super effective, in FAR less time than anything else I have used. But then to also discover the huge amount of product in each syringe. For once I don't have to scrimp and hope there's enough to achieve the effect I want. The consistency was fine and I had no trouble putting it in the trays, which I already owned. If I get too much, I just wipe the edge of the tray after it is on my teeth. This product is a far more economical choice than the dentist, and a far more effective choice than most well-known gels. It whitens better and faster than the product my dentist offers, and the dentist's gel costs almost 4 times as much for less gel. . If you have never whitened before you may want to start with a less-strong product. Or at the very least, leave a few days between each whitening session. For those who have whitened in the past and are feeling disappointed with results, try this one. It's a great value.