I recently bought some dentist quality high strength tooth whitener from happysmile.co.uk. I have only just begun using it so I have not seen the full effects of the prduct yet, although it seems like some potent stuff. I read proper dental reviews on it which said that it was effective and safe to use. It costs a fortune from the dentist / for the full pack. I saw it on happysmile for £25 for 4 suringes (very cheap). It didn't come with anything but happysmile did enclose a copy of their own instructions which were fine.

With regard to happysmile.co.uk, I have read some very negative reviews which worried me as they indicated the company was a scam. I worried about this when myh products didn't arrive after a few days and contacted them. I reached their 'callcentre' who I believe consisted of one person. It was a bit hit ans miss if you couold get someone to answer the phone. HOWEVER, I did speak to a lady there called Gwen who was very helpful. When I'd spoken to her my parcel arrived 2 days later which I was very happy about.

Points to note when dealing with happysmile:
1) They do not sned packages recorded delivery and so they may get lost in the post
2) Their website is not updated properly so it's best to call them to confirm if the products are in stock
3) Their delivery times are uncertain. If you call them and say that you want it asap then I think they make the effort to get it to you straight away, otherwise I'm not sure how long you'd be waiting?

Overall I would use them again PURELY because of the good price of their products and the things they market, plus the lady who helped me was very nice and helpful.