Kayak Soft Racks???

Anyone run the soft kayak racks?  I'm looking for a no-drill method of transporting my yaks on top of my tent trailer and these seem like a viable option (and also handy on rental cars).  http://www.seatosummit.com.au/products/transport-and-storage/traveller-soft-racks/

I have them.  I use rental cars when I travel so I picked up a set. I'd say that they are okay but not great.  The loop-strap part doesn't seem like they allow you to get the straps very tight (for me anyways).  However I haven't had any issues the few times that I have used them.

Good info.  I figure with bow/stern lines doing most of the holding, these will function more to prevent side-to-side motion. Or, I'll just go ghetto with some carpeted 2x4's and eyebolts.

I've used something similar in a pinch, but even cheaper -- they were called pool noodles. 

Now you're going super ghetto!  I've run them before, lost one, yak went sideways but stayed on...told myself pool noodles are for flotation, not for security.