Posi-Lok 4X4 Front Differential Device

I'm sure many of you have heard of this product before. It basically replaces the factory vacuum device that connects the passenger axle to the front differential with a manual pull handle that mounts under the dash.

More here: www.4x4posi-lok.com/app_chevy-s.html

I was wondering if anyone here had one, and if so, if you liked it and how well it works. I was also wondering since the vacuum system isn't used, if it was posible to completely remove all of the vacuum (not vent) lines from the t-case. I just like to get rid of things that aren't necessary.