Crest Night Effects or Crest Whitestrips?

[The Electrifyer]

My teeth are pretty yellow even after regular teeth brushing. I'd like to get a professional whitening from the dentist, but that costs too much and is more than I'd like to go. I have heard some great reviews for these products, but I'd just like to find out which one is the best. There's not many reviews online for them that I can find, so do I'm asking here. Any of you guys tried them out and know which one is best?

[kkktookmybabyaway]

I've only used Whitestrips. Was fine for me, I guess.