The dribble at the bottom of the webpage:
"After reading the comparisons, there are only two summaries which can be arrived at:
1) The NIV is as corrupt as the NWT, or
2) The NWT is as accurate as the NIV"
I have had the NIV for years and it hasn't hindered me from knowing the word of God. I have lots of notations from the Hebrew and Greek definitions, as well as the interlinear in my margins. It is also helpful to be able to look at all of the major translations at a glance, which aids in understanding what scripture is saying.