has anyone used these, I hate my teeth with a passion but can't afford professional whitening.

I bought some off ebay recently but they make my teeth hurt soooo much. They also taste disgusting! I'm on hiatus from them at the moment.
Start weight - 18st 10lb (my biggest ever) 01/06/10Target 1 - Get down into 17's
Target 2 - Get down to 17 1/2
Target 3 - Get down into 16's 14/07/10
Target 4 - Get 10% off (16s 12lb) 19/07/10
Target 5 - Get down to 16 1/2
Target 6 - Get down into 15's
Target 7 - To have people notice I've lost weight (one tick each time)
Target 8 - Get down to 15 1/2
Target 9 - Get down to 14's
Target 10 - To get to 200lb (target) by 6/8/11
I've heard most tooth related products by crest are amazing, but I think it's only the ones coming from the US? I looked at the ingrediants and they say the supreme whitening strips contain 14% Hydrogen peroxide, I went through a stage of just buying bottles of HP online and just dabbing a tiny bit on my toothbrush (big bottles are like... £5) Only thing is that both contain acid so it can erode stuff after a long time. (just my 2 cents!) I looked at the whitening strips and YOWZA expensive
I have sensitive teeth and used them for the week without any real issues. Brushed with sensodyne when I took them off. They did hurt quite a bit on the last day.
I found them excellent for whitening and the results lasted ages. Have more waiting for me to get round to using them. Got mine all off ebay with no problems
i personally use them once a day for the past two months..i dont think they taste horrible or any down side to them at all..they make my teeth whiter...not as fast as magic but it does help alot! i love them
I started out Sept 2009 at 211lbs. March 2010 i had lost 53lbs which had me at 158lbs....Restarting my final diet after gaining weight due to two new jobs, Boobies, a divorce, a new relationship, a new house. Phew! at 181lbs on March 30th 2011.
Update! It is now Sept 9th and i weigh 165lbs! yay!!
Update! It is now Oct 15th and i weigh 156lbs! YAY!
I recommend this product from the US you can buy on eBay it doesn't irritate my gums and it actually works.
Teeth Whitening Products and Toothpastes : Plus White
I want my skinny jeans back!