I booked hotels with booking.com many times and everytime everything was perfect. Hotel prices on booking.com are even cheaper than if you would pay directly at the hotel. The site offers hotels from all around the world, you will find there hotel reviews, prices, photos and everything you need to know about your hotel. And it's so easy to book even for such a beginner as I am. But I agree with some people above, better avoid paying with credit card, I use 3V :)