I see that this thread is generating a lot of emotions, my experience with this website so far was always very good. Invested 3-4 times and got all payouts in the expected hours, also i recommended this website to some of my friends and they got all payouts too.

btc2double website is paying unlike almost all websites with this kind of service. I'm very happy with them and today i made  another investment of 0.055 BTC about 4 hours ago, will update this post when i received it!

UPDATE:

RECEIVED! 0.11 BTC Payout: https://www.blocktrail.com/BTC/tx/a8b3df9ec6cd78ca201c6ae2309efc00cdb0ea3e60f42f707f6217cf6a672175

Amazing! Thank you!