My 1st generation LowePro neoprene straps have served both my cameras well to date BUT their old anti-slip dots aren't up to the task when I'm wearing certain fabrics... I hope that the new anti-slip thread that has been sewen into the underside of these second generation straps does a better job of it.
For what it's worth, I'll probably elect for the Voyager C type strap, though I'm drawn towards the Speedster strap for PJ use. Once I find somewhere that stocks them, I'll prize open the wallet and later let folks know how good (or not) they are