I've tried all kinds of whitening products over the years, few if any really worked well. All made my teeth sensitive. Crest white Strips were the most painful. You couldn't pay me to use those again! Whitening toothpastes are a nice idea, but don't work any better than regular toothpaste. After reading reviews here, I decided to spend the big $7 and give Plus White shot. I'm so glad I did! It actually works - really well and it's pain free! I have zero complaints about this product. It's a big tube and lasts a long time. What's a little mess, just use less. Rinse well. No big deal. For $7 this is a steal. Just put a little in the soft pliable tray; don't go all the way to the ends; just enough for the center top & bottom. Put it in and make sure the gel squishes up to cover the whole tooth and let it sit per package directions. Rinse and you're done. No pain and after a few days, whiter teeth. Make sure you brush your teeth prior to using, it'll work better.
I'll definitely repurchase and I highly recommend you try it!