I did a search and didn't see anything on them.  They look interesting so I got one from AIM.

I just picked up a FDE Cross Tac sling to try out.  I'm pretty fond of VTAC 2-points and I like the Magpul MS2 concept so I'm hoping that this sling will be more comfortable than the MS2 and have the flexibility of converting to a 1-point like the Magpul.  I'll kick it around and see how it works.  Here's a link to the sling:

http://www.crosstac.com/store.html?page=shop.product_details&flypage=flypage.tpl&product_id=118&category_id=39

I'm looking forward to hearing more about this and have been thinking about getting one from AIM but couldn't find a whole lot of reviews on this.

So far it looks good.  I'm gonna slap it on a carbine this weekend and see how I like it.  I'm not gonna have a lot of time to shoot this weekend so don't expect much......

Very happy that you are trying the sling! If you have any q's we're here for you.
- Bret Heidkamp