To Whiten or not to Whiten, that is the question

Hello.. my name is Jennifer and I love tea. 

I can go on about all the health benefits of tea, but i'm here to rant about the after effects.

DISCOLORATION!

I've tried those crest white strips but I'm too lazy to keep on doing them daily!

I'm thinking about getting a full teeth whitening just like Ande (seen below).  

I'm scared as hell for the after effects that I heard some people go through:
* Chemical burns from gel bleaching

* Pain
* Hot/cold sensitivity

My question for you is what type of teeth whitening products do you use/ have you used?