I bought the Brooks leather tape a couple of months ago. It was a bit odd to put on because it has no stretch to it at all. The tape has gotten wet a few times so far. Rain just seems to run off. The tape is not bothered at all.
Btw, the honey colored tape does not match the honey colored B17. Even accounting for the extra time I have had the B17, the tape is lighter in color. Over time it *may* darken to match the saddle, but probably not. Just a note for the OCP folks.
The brown or black combinations would probably match much better.
When applying the tape you have to take into account where the tape is stitched together. Each side is actually three different sections stitched end to end to end. Depending on how you start the wrap, you could have a "stitching section" on the top side of the bars, right under your hand. Not only will it be extremely visible, but you will also feel it all of the time, and you will cause extra wear on the stitching itself. I wrapped and re-wrapped a number of times in an effort to minimize the exposure of the stitching sections.
I'll have to wait a bit to see how sweaty it gets. Can't be any worse than cork.
The cost of the tape will be justified if it lasts three times as long as cork. Since I don't get much mileage out of normal tape, the Brooks tape will have to last maybe 1 or 1.5 years, max. Besides, it looks really nice.