I've been using a Werner BS for over a year. Because it's "just a paddle" to me, I don't even know which model it is (but I think it's 210 cm in length).

I like the thickness of the shaft and I actually like holding it in different spots along the shaft as it seems to lessen the stress on my wrists. At this point I consider it a big improvement over my other paddle which has a straight shaft. Only down side is that I do get a bit of flutter.

If I ever bump into anyone using a GP, I'll give one a try.