Time for translation and checking

I translated about for 5 hours and I feel I did good job. It took a lot of hours to translate for me because I can't translate fast. A professional translator I met at the seminar uses time for checking as much as 5 to 6 times of translating. I think she translates very fast and takes enough time for checking. She says the checking is very important and it is the most interesting part of translating. We should check mistakes and consider the sentences in order to make the best sentences. I think it must be true. I will check precisely to make sentences easy to understand and accurate to the original one.