Z-Wave Range

Hi All,

I am trying to extend Z-Wave into the garden as I slowly replace X10. I'm having trouble getting it outside the house boundary. I have 1 plugin unit on the inside of the wall, and another one in the conservatory, but neither will see a plugin unit located in the external box (about 5ft away from the external wall).

So, I was looking at one of these.

http://www.vesternet.com/z-wave-vision-repeater

It seems to have a longer range (200m) than the normal plugin units (100m) but wanted to know if anyone has had any real world use of these units? Do they actually work any better?

Thanks in advance.