Bests & Worsts Reviews from Amazon

The many good reviews on this product is what convinced me into purchasing it. However, I’m not sure if this is to dramatically whiten teeth or for maintenance on teeth that are already white (which isn’t my case). Tried the first set of trays with no results. Tried the second set, they stung a lot and were uncomfortable and still saw no results...just made my gums bleed. Couldn’t use the third set of trays the next day because my gums were still sore and healing. It’s taken 5 days for them to fully heal. Don’t know if I want to continue using. I get that everyone’s different, but definitely keep that in mind if you’re considering buying this product.