White Lightning wrote a review of The North Face Arnuva 100 TR GTX Trail Running Shoe - Men's on May 1, 2008
I bought these to be completely waterproof, as I've really appreciated that in a pair of studded Ice Runners I used all winter in ice and snow. Compared to my water-resistant Brooks ASR running shoes, the North Face Arnuva 100 TR GTX truly is more waterproof, though I did get wet once so far by stepping in a puddle deeper than the shoe (not much a shoe can do about that.)
I've been surprised how warm they are when worn indoors, compared to the ASRs. I suspect that will limit my use of them to days I really expect rain, and that I'll still use the ASRs when there's only a chance of rain.
I'm not usually a trail runner, so can't comment on that aspect of the North Face shoes. On pavement or asphalt, they are noticeably slower than my Newtons, about 2 minutes slower in a 5K, with much of that difference due to having to run more carefully in the rain. (The good news is that now I _CAN_ run in the rain.)
My main use for these is walking 4 miles a day to work on rainy days, and they are wonderful for that.
Overall, I'm really glad to have them, and would buy them again.